WorldWideScience

Sample records for geothermal exploration technology

  1. Technologies for the exploration of highly mineralized geothermal resources

    Science.gov (United States)

    Alkhasov, A. B.; Alkhasova, D. A.; Ramazanov, A. Sh.; Kasparova, M. A.

    2017-09-01

    The prospects of the integrated processing of the high-parameter geothermal resources of the East Ciscaucasia of artesian basin (ECAB) with the conversion of their heat energy into electric energy at a binary geoPP and the subsequent extraction of solved chemical compounds from thermal waters are evaluated. The most promising areas for the exploration such resources are overviewed. The integrated exploration of hightemperature hydrogeothermal brines is a new trend in geothermal power engineering, which can make it possible to significantly increase the production volume of hydrogeothermal resources and develop the geothermal field at a higher level with the realization of the energy-efficient advanced technologies. The large-scale exploration of brines can solve the regional problems of energy supply and import substitution and fulfill the need of Russia in food and technical salt and rare elements. The necessity of the primary integrated exploration of the oil-field highly mineralized brines of the South Sukhokumskii group of gas-oil wells of Northern Dagestan was shown in view of the exacerbated environmental problems. Currently, the oil-field brines with the radioactive background exceeding the allowable levels are discharged at disposal fields. The technological solutions for their deactivation and integrated exploration are proposed. The realization of the proposed technological solutions provides 300 t of lithium carbonate, 1650 t of caustic magnesite powder, 27300 t of chemically precipitated chalk, 116100 t of food salt, and up to 1.4 mln m3 of desalinated water from oil-field brines yearly. Desalinated water at the output of a geotechnological complex can be used for different economic needs, which is important for the arid North Caucasus region, where the fresh water deficiency is acute, especially in its plain part within the ECAB.

  2. Advanced Percussive Drilling Technology for Geothermal Exploration and Development

    Energy Technology Data Exchange (ETDEWEB)

    Su, Jiann [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Raymond, David [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Prasad, Somuri [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Wolfer, Dale [Atlas-Copco Secoroc LLC, Fagersta (Sweden)

    2017-06-12

    Percussive hammers are a promising advance in drilling technology for geothermal since they rely upon rock reduction mechanisms that are well-suited for use in the hard, brittle rock characteristic of geothermal formations. The project research approach and work plan includes a critical path to development of a high-temperature (HT) percussive hammer using a two phase approach. The work completed in Phase I of the project demonstrated the viability of percussive hammers and that solutions to technical challenges in design, material technology, and performance are likely to be resolved. Work completed in Phase II focused on testing the findings from Phase I and evaluating performance of the materials and designs at high operating temperatures. A high-operating temperature (HOT) drilling facility was designed, built, and used to test the performance of the DTH under extreme conditions. Results from the testing indicate that a high-temperature capable hammer can be developed and is a viable alternative for use in the driller’s toolbox.

  3. INTEGRATED EXPLORATION OF GEOTHERMAL RESOURCES

    OpenAIRE

    A. B. Alkhasov; D. A. Аlkhasova; R. M. Aliyev; A. Sh. Ramazanov

    2016-01-01

    The aim. The aim is to develop the energy efficient technologies to explore hydro geothermal resources of different energy potential.Methods. Evaluation of the effectiveness of the proposed technologies has been carried out with the use of physical and mathematical, thermodynamic and optimization methods of calculation and the physical and chemical experimental research.Results. We propose the technology of integrated exploration of low-grade geothermal resources with the application of heat ...

  4. INTEGRATED EXPLORATION OF GEOTHERMAL RESOURCES

    Directory of Open Access Journals (Sweden)

    A. B. Alkhasov

    2016-01-01

    Full Text Available The aim. The aim is to develop the energy efficient technologies to explore hydro geothermal resources of different energy potential.Methods. Evaluation of the effectiveness of the proposed technologies has been carried out with the use of physical and mathematical, thermodynamic and optimization methods of calculation and the physical and chemical experimental research.Results. We propose the technology of integrated exploration of low-grade geothermal resources with the application of heat and water resource potential on various purposes. We also argue for the possibility of effective exploration of geothermal resources by building a binary geothermal power plant using idle oil and gas wells. We prove the prospect of geothermal steam and gas technologies enabling highly efficient use of thermal water of low energy potential (80 - 100 ° C degrees to generate electricity; the prospects of complex processing of high-temperature geothermal brine of Tarumovsky field. Thermal energy is utilized in a binary geothermal power plant in the supercritical Rankine cycle operating with a low-boiling agent. The low temperature spent brine from the geothermal power plant with is supplied to the chemical plant, where the main chemical components are extracted - lithium carbonate, magnesium burning, calcium carbonate and sodium chloride. Next, the waste water is used for various water management objectives. Electricity generated in the binary geothermal power plant is used for the extraction of chemical components.Conclusions. Implementation of the proposed technologies will facilitate the most efficient development of hydro geothermal resources of the North Caucasus region. Integrated exploration of the Tarumovsky field resources will fully meet Russian demand for lithium carbonate and sodium chloride.

  5. Geothermal energy technology

    Energy Technology Data Exchange (ETDEWEB)

    1977-01-01

    Geothermal energy research and development by the Sunshine Project is subdivided into five major categories: exploration and exploitation technology, hot-water power generation technology, volcanic power generation technology, environmental conservation and multi-use technology, and equipment materials research. The programs are being carried out by various National Research Institutes, universities, and private industry. During 1976 and 1977, studies were made of the extent of resources, reservoir structure, ground water movement, and neotectonics at the Onikobe and Hachimantai geothermal fields. Studies to be performed in the near future include the use of new prospecting methods, including artificial magnetotellurics, heat balance calculation, brightspot techniques, and remote sensing, as well as laboratory studies of the physical, mechanical, and chemical properties of rock. Studies are continuing in the areas of ore formation in geothermal environments, hot-dry-rock drilling and fracturing, large scale prospecting technology, high temperature-pressure drilling muds and well cements, and arsenic removal techniques.

  6. Geothermal Technologies Program: Alaska

    Energy Technology Data Exchange (ETDEWEB)

    2005-02-01

    This fact sheets provides a summary of geothermal potential, issues, and current development in Alaska. This fact sheet was developed as part of DOE's GeoPowering the West initiative, part of the Geothermal Technologies Program.

  7. FY 1998 report on the verification survey of geothermal exploration technology, etc. 2/2. Survey of deep geothermal resource; 1998 nendo chinetsu tansa gijutsu nado kensho chosa hokokusho. 2/2. Shinbu chinetsu shigen chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-12-01

    For the purpose of commercializing deep geothermal resource, a deep exploration well of 4000m class was drilled in the existing geothermal development area to survey the situation of deep geothermal resource existence and the availability. Concretely, the deep geothermal exploration well was drilled for study in the Kakkonda area, Shizukuishi town, Iwate prefecture, to clarify the situation of deep geothermal resource existence and the whole image of geothermal system. Consideration was made of the deep geothermal exploration method, systematization of deep high temperature drilling technology, and availability of deep geothermal resource. The results of the survey were summed up as follows: 1) general remarks; 2) deep exploration well drilling work; 3) details of the study. This report contained 3). In 3), the items were as follows: heightening of accuracy of the deep geothermal resource exploration method, making of a geothermal model in the Kakkonda area, study of deep drilling technology, study of deep fluid utilization technology, and making of a guide for deep geothermal resource exploration/development in the Kakkonda area. As to the technology of high temperature deep geothermal well drilling, studies were made of the borehole cooling method, mud water cooling method, survey of deterioration of casing with age, etc. (NEDO)

  8. Innovative exploration technologies in the Jemez Geothermal Project, New Mexico, USA; Innovative Explorationstechniken im Jemez Geothermal Projekt, New Mexico, USA

    Energy Technology Data Exchange (ETDEWEB)

    Albrecht, Michael [TBAPower Inc., Salt Lake City, UT (United States); Tenzer, Helmut; Sperber, Axel; Bussmann, Werner [uutGP GmbH, Geeste (Germany)

    2012-10-16

    First geothermal explorations were carried out in the year 1989 in the sovereign Indian Reservation situated nearly 70 km northwest of Albuquerque. (New Mexico, United States of America). In 1991, an exploration drilling at a depth of 80 meter supplied artesian 52 Celsius hot water with xx L/s. Different feasibility studies on the geothermal utilization and on different utilization concepts were established. The economic situation of the region has to be improved by means of a coupled geothermal utilization. The region was explored by means of magnetotellurics (up to depth of 8 kilometre) and reflection seismics (up to a depth of 2.2 kilometre). A graben structure between the Indian Spring fault in the west and the Vallecitos fault in the east are indicative of a geothermal convection zone. Subsequently, an innovative seismic data analysis by means of Elastic Wave Reverse-Time Migration and Wavefield-Separation Imaging Condition was performed. The previous model could be improved considerably. A preliminary drilling program up to a depth of 2,000 meter with Casing design and planning of the borepath occurred. Under socio-economic aspects, up to nine members of the tribe enjoyed an education or further training to engineers under the control of TBA Power Inc. (Salt Laky City, Utah, United State of America).

  9. Geothermal Power Technologies

    DEFF Research Database (Denmark)

    Montagud, Maria E. Mondejar; Chamorro, C.R.

    2017-01-01

    Although geothermal energy has been widely deployed for direct use in locations with especial geologic manifestations, its potential for power generation has been traditionally underestimated. Recent technology developments in drilling techniques and power conversion technologies from low......-temperature heat resources are bringing geothermal energy to the spotlight as a renewable baseload energy option for a sustainable energy mix. Although the environmental impact and economic viability of geothermal exploitation must be carefully evaluated for each case, the use of deep low-temperature geothermal...... reservoirs could soon become an important contributor to the energy generation around the world....

  10. Fiscal 1995 verification survey of geothermal exploration technology. Report on a deep geothermal resource survey; 1995 nendo chinetsu tansa gijutsu nado kensho chosa. Shinbu chinetsu shigen hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-06-01

    For the purpose of reducing the risk of deep geothermal resource development, the paper investigated three factors for the formation of geothermal resource in the deep underground, that is, heat supply from heat source, supply of geothermal fluids, and the developmental status of fracture systems forming reservoir structures. The survey further clarified the status of existence of deep geothermal resource and the whole image of the geothermal system including shallow geothermal energy in order to research/study usability of deep geothermal resource. In the deep geothermal resource survey, drilling/examination were made of a deep geothermal exploration well (`WD-1,` target depth: approximately 3,000-4,000m) in the already developed area, with the aim of making rationalized promotion of the geothermal development. And the status of existence of deep geothermal resource and the whole image of the geothermal system were clarified to investigate/study usability of the geothermal system. In fiscal 1995, `WD-1` in the Kakkonda area reached a depth of 3,729m. By this, surveys were made to grasp the whole image of the shallow-deep geothermal system and to obtain basic data for researching usability of deep geothermal resource. 22 refs., 531 figs., 136 tabs.

  11. FY 1998 report on the verification survey of geothermal exploration technology, etc. 1/2. Survey of deep geothermal resource; 1998 nendo chinetsu tansa gijutsu nado kensho chosa hokokusho. 1/2. Shinbu chinetsu shigen chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-12-01

    For the purpose of commercializing deep geothermal resource, a deep exploration well of 4000m class was drilled in the existing geothermal development area to survey the situation of deep geothermal resource existence and the availability. Concretely, the deep geothermal exploration well was drilled for study in the Kakkonda area, Shizukuishi town, Iwate prefecture, to clarify the situation of deep geothermal resource existence and the whole image of geothermal system. Consideration was made of the deep geothermal exploration method, systematization of deep high temperature drilling technology, and availability of deep geothermal resource. The results of the survey were summed up as follows: 1) general remarks; 2) deep exploration well drilling work; 3) details of the study. 1) and 2) were included in this report, and 3) in the next report. In 1), the items were as follows: the study plan/gist of study execution, the details and results of the deep geothermal resource survey, the outline of the deep exploration well drilling work, and the outline of the results of the FY 1998 study. In 2), the drilling work plan/the actual results of the drilling work were summed up. As to the results of the study, summarized were the acquisition of survey data on deep exploration well, heightening of accuracy of the deep geothermal resource exploration method, etc. (NEDO)

  12. Technology assessment of geothermal energy resource development

    Energy Technology Data Exchange (ETDEWEB)

    1975-04-15

    Geothermal state-of-the-art is described including geothermal resources, technology, and institutional, legal, and environmental considerations. The way geothermal energy may evolve in the United States is described; a series of plausible scenarios and the factors and policies which control the rate of growth of the resource are presented. The potential primary and higher order impacts of geothermal energy are explored, including effects on the economy and society, cities and dwellings, environmental, and on institutions affected by it. Numerical and methodological detail is included in appendices. (MHR)

  13. Geothermal Today: 2003 Geothermal Technologies Program Highlights (Revised)

    Energy Technology Data Exchange (ETDEWEB)

    2004-05-01

    This outreach publication highlights milestones and accomplishments of the DOE Geothermal Technologies Program for 2003. Included in this publication are discussions of geothermal fundamentals, enhanced geothermal systems, direct-use applications, geothermal potential in Idaho, coating technology, energy conversion R&D, and the GeoPowering the West initiative.

  14. 2008 Geothermal Technologies Market Report

    Energy Technology Data Exchange (ETDEWEB)

    Cross, J.; Freeman, J.

    2009-07-01

    This report describes market-wide trends for the geothermal industry throughout 2008 and the beginning of 2009. It begins with an overview of the U.S. DOE's Geothermal Technology Program's (GTP's) involvement with the geothermal industry and recent investment trends for electric generation technologies. The report next describes the current state of geothermal power generation and activity within the United States, costs associated with development, financing trends, an analysis of the levelized cost of energy (LCOE), and a look at the current policy environment. The report also highlights trends regarding direct use of geothermal energy, including geothermal heat pumps (GHPs). The final sections of the report focus on international perspectives, employment and economic benefits from geothermal energy development, and potential incentives in pending national legislation.

  15. Geothermal technology in Australia: Investigating social acceptance

    International Nuclear Information System (INIS)

    Dowd, Anne-Maree; Boughen, Naomi; Ashworth, Peta; Carr-Cornish, Simone

    2011-01-01

    Issues of social acceptance, such as lack of awareness and negative community perceptions and reactions, can affect low emission energy technology development, despite general support observed for reducing carbon emissions and mitigating climate change. Negative community reactions and lack of understanding have affected geothermal developments, as demonstrated by the fearful community reactions and negative media experienced in response to seismic disturbances caused by 'hot rock' geothermal energy generation in Switzerland and Germany. Focusing on geothermal energy, this paper presents the results of using a participatory action research methodology to engage diverse groups within the Australian public. A key finding is that the majority of the Australian public report limited the knowledge or understanding of geothermal technology and have various concerns including water usage and seismic activity instigated by geothermal drilling. However, geothermal energy receives general support due to a common trend to champion renewable energy sources in preference to traditional forms of energy generation and controversial technologies. This paper also demonstrates the effectiveness of using an engagement process to explore public understanding of energy technologies in the context of climate change, and suggests a way forward for governments and industry to allocate resources for greatest impact when communicating about geothermal technology. - Highlights: → Majority of Australians have limited knowledge or understanding of geothermal technology. → Various concerns, including water usage and seismic activity instigated by drilling, were raised. → Geothermal energy has general support due to a common trend to champion renewable energy sources. → Methodology shows the effectiveness of an engagement process to explore public understanding. → Participants expressed intention to change behaviours, which can be a catalyst for change.

  16. Investigation on the development and introduction of new geothermal exploration technology. Part 2; Chinetsu shintansa gijutsu kaihatsu donyu ni kansuru chosa. 2

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-02-01

    For the purpose of maintaining and increasing the geothermal power generation amount, the development was made of exploration technologies which become necessary in the stage of geothermal reservoir exploration and in the stage of reservoir management and peripheral development. As development technologies, the following were proposed: fracture flow characteristics exploration method (FE), production/circumference areas flow characteristics exploration method (PE), and integrated analyzing method (IA). As to FE, for the survey of geothermal fluid dynamic characteristics in fracture aggregate composing the geothermal reservoir, developments were made of the well hydraulic testing method for examining hydraulic characteristics of fracture system and of the fracture evaluation method composed of the core/logging analysis method, the permeability logging method and electroseismic exploration method. As to PE, for maintaining and managing steam production in the developmental area and developing the area to the circumference area, development was conducted of technology for exploring variations of reservoirs and fluid flow from the data on precision gravity, three-dimensional resistivity, fluid geochemistry, active seismic wave and self potential, precision electromagnetism, passive seismic wave, etc. As to IA, development was made of reservoir simulation technique, etc. 2 refs., 70 figs., 41 tabs.

  17. Geothermal Exploration of Newberry Volcano, Oregon

    Energy Technology Data Exchange (ETDEWEB)

    Waibel, Albert F. [Columbia Geoscience, Pasco, WA (United States); Frone, Zachary S. [Southern Methodist Univ., Dallas, TX (United States); Blackwell, David D. [Southern Methodist Univ., Dallas, TX (United States)

    2014-12-01

    Davenport Newberry (Davenport) has completed 8 years of exploration for geothermal energy on Newberry Volcano in central Oregon. Two deep exploration test wells were drilled by Davenport on the west flank of the volcano, one intersected a hydrothermal system; the other intersected isolated fractures with no hydrothermal interconnection. Both holes have bottom-hole temperatures near or above 315°C (600°F). Subsequent to deep test drilling an expanded exploration and evaluation program was initiated. These efforts have included reprocessing existing data, executing multiple geological, geophysical, geochemical programs, deep exploration test well drilling and shallow well drilling. The efforts over the last three years have been made possible through a DOE Innovative Exploration Technology (IET) Grant 109, designed to facilitate innovative geothermal exploration techniques. The combined results of the last 8 years have led to a better understanding of the history and complexity of Newberry Volcano and improved the design and interpretation of geophysical exploration techniques with regard to blind geothermal resources in volcanic terrain.

  18. Geothermal Technologies Program: Direct Use

    Energy Technology Data Exchange (ETDEWEB)

    2004-08-01

    This general publication describes geothermal direct use systems, and how they have been effectively used throughout the country. It also describes the DOE program R&D efforts in this area, and summarizes several projects using direct use technology.

  19. 2008 Geothermal Technologies Market Report

    Energy Technology Data Exchange (ETDEWEB)

    Jonathan Cross

    2009-07-01

    This report describes market-wide trends for the geothermal industry throughout 2008 and the beginning of 2009. It begins with an overview of the GTP’s involvement with the geothermal industry and recent investment trends for electric generation technologies. The report next describes the current state of geothermal power generation and activity within the United States, costs associated with development, financing trends, an analysis of the levelized cost of energy (LCOE), and a look at the current policy environment. The report also highlights trends regarding direct use of geothermal energy, including GHPs.† The final sections of the report focus on international perspectives, employment and economic benefits from geothermal energy development, and potential incentives in pending national legislation.

  20. Geothermal energy utilization and technology

    CERN Document Server

    Dickson, Mary H; Fanelli, Mario

    2013-01-01

    Geothermal energy refers to the heat contained within the Earth that generates geological phenomena on a planetary scale. Today, this term is often associated with man's efforts to tap into this vast energy source. Geothermal Energy: utilization and technology is a detailed reference text, describing the various methods and technologies used to exploit the earth's heat. Beginning with an overview of geothermal energy and the state of the art, leading international experts in the field cover the main applications of geothermal energy, including: electricity generation space and district heating space cooling greenhouse heating aquaculture industrial applications The final third of the book focuses upon environmental impact and economic, financial and legal considerations, providing a comprehensive review of these topics. Each chapter is written by a different author, but to a set style, beginning with aims and objectives and ending with references, self-assessment questions and answers. Case studies are includ...

  1. Report on the results of the Sunshine Project - Verification survey for geothermal exploration technology, etc. Summary. Survey of deep geothermal resource; Chinetsu tansa gijutsu tou kensho chosa. Shinbu chinetsu shigen chosa sokatsu seika hokokusho (Yoyaku)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-03-01

    As to the development of deep geothermal resource which is expected to contribute to increasing the capacity of future power generation in Japan, investigational study was made from FY 1992 to FY 2000, and the results were summed up. The investigational study was conducted for the hydrothermal convection type deep geothermal resource with a thermal conducting heating mechanism, of which Kakkonda is typical, including the drilling of deep exploration well using the existing technology. As a result, new information/knowledge were acquired about the thermal structure, reservoir structure and hydrothermal supply structure of the depths, and a deep geothermal model was made. Based on the model, a detailed simulation was made possible, and a whole image of the hydrothermal convection type deep geothermal resource with the thermal conducting heating mechanism was made clear. In the surface survey, observation of microearthquakes, high-accuracy MT method, etc. were carried out, and a grasp of the shape of a new granite body from the surface was made possible. Concerning the drilling technology, the geologic stratum with a temperature over 500 degrees C was successfully drilled down to a depth of 3,729m by prolonging the life of bit at the time of drilling by introducing the top drive system, the closed mud cooling device, etc. (NEDO)

  2. Fiscal 1996 verification survey of geothermal exploration technology. Development of the fracture type reservoir exploration method (development of the elastic wave use exploration method); 1996 nendo chinetsu tansa gijutsu nado kensho chosa. Danretsugata choryuso tansaho kaihatsu (danseiha riyo tansaho kaihatsu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    For the purpose of exploring accurately fracture groups greatly restricting the fluid flow of geothermal reservoirs, technical development was made for applying the elastic wave exploration technology such as the high precision reflection method, VSP, elastic wave tomography to the geothermal exploration. The Okiri area, Kagoshima prefecture was selected as a demonstrative field of a typical type where the steep and predominant fracture rules the geothermal reservoir, and experiments were conducted using the high precision reflection method and VSP. Fracture models were made, and the analysis results were studied by a survey using the array CSMT/MT method and by a comparison with existing data. Reformation of the underground receiving system used for VSP and elastic tomography is made for improvement of its viability, and was applied to the VSP experiment. The treatment/analysis system of the core analyzer was improved, and cores of the demonstrative field were analyzed/measured. Further, the exploration results, core analysis results and existing data were synthetically analyzed, and fracture models of the demonstrative field were constructed. Also, effectiveness and viability of the elastic wave use exploration method were studied. 90 refs., 418 figs., 24 tabs.

  3. FY 1995 report on verification of geothermal exploration technology. Development of fracture reservoir exploration technology (development of seismic exploration); 1995 nendo chinetsu tansa gijutsunado kensho chosa. Danretsugata choryuso tansaho kaihatsu (danseiha riyo tansaho kaihatsu) hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    This report provides the development of new exploration technology using elastic waves, such as reflection seismic survey, VSP, and seismic tomography, for precisely characterizing subsurface fractures in geothermal reservoirs. In order to investigate and improve the effective data acquisition and analysis methods for detecting a fault type of fractures, an experiment of a seismic tomography method was conducted using wells drilled in the Ogiri geothermal field, Aira-gun, Kagoshima Prefecture. An experiment of propagation characteristics of piezo type underground seismic source in the volcanic field was also conducted as a trend survey of underground seismic sources. The fracture type in the model field was systematically analyzed by measuring the core samples obtained in the demonstration test field through remanence measurement, fluid inclusion measurement, and zircon measurement using test equipment, and by analyzing results obtained from cores and results of seismic tomography obtained from the wells. Based on these results, the effectiveness and practical application of exploration methods using elastic waves were investigated. 80 refs., 250 figs., 49 tabs.

  4. Geothermal Exploration Case Studies on OpenEI (Presentation)

    Energy Technology Data Exchange (ETDEWEB)

    Young, K.; Bennett, M.; Atkins, D.

    2014-03-01

    The U.S. Geological Survey (USGS) resource assessment (Williams et al., 2008) outlined a mean 30 GWe of undiscovered hydrothermal resource in the western United States. One goal of the U.S. Department of Energy's (DOE) Geothermal Technology Office (GTO) is to accelerate the development of this undiscovered resource. DOE has focused efforts on helping industry identify hidden geothermal resources to increase geothermal capacity in the near term. Increased exploration activity will produce more prospects, more discoveries, and more readily developable resources. Detailed exploration case studies akin to those found in oil and gas (e.g. Beaumont and Foster, 1990-1992) will give developers central location for information gives models for identifying new geothermal areas, and guide efficient exploration and development of these areas. To support this effort, the National Renewable Energy Laboratory (NREL) has been working with GTO to develop a template for geothermal case studies on the Geothermal Gateway on OpenEI. In 2012, the template was developed and tested with two case studies: Raft River Geothermal Area (http://en.openei.org/wiki/Raft_River_Geothermal_Area) and Coso Geothermal Area (http://en.openei.org/wiki/Coso_Geothermal_Area). In 2013, ten additional case studies were completed, and Semantic MediaWiki features were developed to allow for more data and the direct citations of these data. These case studies are now in the process of external peer review. In 2014, NREL is working with universities and industry partners to populate additional case studies on OpenEI. The goal is to provide a large enough data set to start conducting analyses of exploration programs to identify correlations between successful exploration plans for areas with similar geologic occurrence models.

  5. Missing a trick in geothermal exploration

    Science.gov (United States)

    Younger, Paul L.

    2014-07-01

    Expansion of geothermal energy use across the globe is restricted by out-of-date prejudices. It is time for geothermal exploration to be extended to a broader range of environments and rejuvenated with the latest insights from relevant geoscience disciplines.

  6. Development of technologies for utilizing geothermal energy

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1995-09-01

    In verifying the effectiveness of the deep geothermal resource exploration technology, development is being carried out on a fracture-type reservoir exploration method. The seismic exploration method investigates detailed structures of underground fracture systems by using seismic waves generated on the ground surface. Verification experiments for fiscal 1994 were carried out by selecting the Kakkonda area in which small fracture networks form reservoir beds. Geothermal resources in deep sections (deeper than 2000 m with temperatures higher than 350{degree}C) are promising in terms of amount of the resources, but anticipated with difficulty in exploration and impediments in drilling. To avoid these risks, studies are being progressed on the availability of resources in deep sections, their utilization possibility, and technologies of effective exploration and drilling. This paper summarizes the results of deep resource investigations during fiscal 1994. It also describes such technological development as hot water utilizing power generation. Development is performed on a binary cycle power generation plant which pumps and utilizes hot water of 150 to 200{degree}C by using a downhole pump. The paper also reports development on element technologies for hot rock power generation systems. It also dwells on development of safe and effective drilling and production technologies for deep geothermal resources.

  7. Geothermal Technologies Program Blue Ribbon Panel Recommendations

    Energy Technology Data Exchange (ETDEWEB)

    none,

    2011-06-17

    The Geothermal Technologies Program assembled a geothermal Blue Ribbon Panel on March 22-23, 2011 in Albuquerque, New Mexico for a guided discussion on the future of geothermal energy in the United States and the role of the DOE Program. The Geothermal Blue Ribbon Panel Report captures the discussions and recommendations of the experts. An addendum is available here: http://www.eere.energy.gov/geothermal/pdfs/gtp_blue_ribbon_panel_report_addendum10-2011.pdf

  8. Verification survey of geothermal exploration technology, etc. Report on the result of the developmental research on the development of the fracture type reservoir exploration method; Chinetsu tansa gijutsu nado kensho chosa. Danretsugata choryuso tansaho kaihatsu kenkyu kaihatsu seika sokatsu hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    For the purpose of grasping fracture groups forming geothermal reservoirs with accuracy, the development of the fracture type reservoir exploration method has advanced the technical development of exploration methods of seismic wave use, electromagnetic induction use, and micro-earthquake use. This paper summarized main results of the development and problems to be solved in the future. In the development of the seismic wave use exploration method, the high accuracy reflection method using seismic wave, VSP and seismic tomography were adopted to the geothermal field, and technology effective for the exploration of fracture type reservoirs was developed. In the development of the electromagnetic induction use exploration method, the array CSMT method which can measure multiple stations along the traverse line at the same time was developed with the aim of grasping effectively and accurately fracture groups forming geothermal reservoirs as changes of resistivity in the shallow-deep underground. In the fracture group forming geothermal reservoirs, micro-earthquakes are generated by movement of thermal water and pressure variations. In the development of the micro-earthquake use exploration method, developed was the micro-earthquake data processing and analysis system (MEPAS). 179 refs., 117 figs., 28 tabs.

  9. DE-FOA-EE0005502 Advanced Percussive Drilling Technology for Geothermal Exploration and Development Phase II Report.

    Energy Technology Data Exchange (ETDEWEB)

    Su, Jiann-Cherng [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Raymond, David W. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Prasad, Somuri V. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Wolfer, Dale R. [Atlas-Copco Secoroc, LLC, Fagersta (Sweden)

    2017-05-01

    Percussive hammers are a promising advance in drilling technology for geothermal since they rely upon rock reduction mechanisms that are well-suited for use in the hard, brittle rock characteristic of geothermal formations. The project research approach and work plan includes a critical path to development of a high-temperature (HT) percussive hammer using a two- phase approach. The work completed in Phase I of the project demonstrated the viability of percussive hammers and that solutions to technical challenges in design, material technology, and performance are likely to be resolved. Work completed in Phase II focused on testing the findings from Phase I and evaluating performance of the materials and designs at high- operating temperatures. A high-operating temperature (HOT) drilling facility was designed, built, and used to test the performance of the DTH under extreme conditions. Results from the testing indicate that a high-temperature capable hammer can be developed and is a viable alternative for user in the driller's toolbox.

  10. NEDO Forum 2000. Geothermal technology development session (new development of geothermal energy); Chinetsu gijutsu kaihatsu session. Chinetsu energy no shintenkai

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-09-01

    The following themes were presented at this session: (1) geothermal development in the future, (2) the current status of geothermal development and utilization, (3) surveys on the promotion of geothermal development, and (4) verification and investigation on geothermal exploration technologies, development of hot water utilizing power generation plants, and international cooperation on geothermal development and utilization. In Item 2, report was made on the current status of geothermal power plants in Japan and their future development targets, long-term overview of geothermal development, measures and budgets to achieve the targets of geothermal development. In Item 3, it is reported that out of 48 areas completed of the survey (including the new promotion surveyed areas), the areas possible of steam power generation and confirmed of temperatures higher than 200 degrees C are 30 areas, and the areas possible of binary power generation (using down hole pumps) and small to medium scale power generation, confirmed of temperatures of 100 to 200 degrees C are 13 areas. In Item 4, reports were made on the reservoir bed variation exploring method, surveys on deep geothermal resources, a 10-MW demonstration plant, a system to detect well bottom information during excavation of geothermal wells, a technology to collect deep geothermal resources, and a hot-rock using power generation system. In Item 5, geothermal exploration in remote islands in the eastern part of Indonesia, and the IEA cooperation projects were reported. (NEDO)

  11. Research on geochemical exploration in geotherm development

    International Nuclear Information System (INIS)

    Hirowatari, Kazuo; Imaizumi, Yukio; Koga, Akito; Iwanaga, Tatsuto.

    1987-01-01

    The decisive factor of geotherm development is to improve the exploration techniques. By effectively carrying out the selection of promising development spots and the decision of well drilling positions, the geotherm development exceeding existing energy sources becomes feasible. There have been many problems in conventional geotherm exploration such as the high cost and long work period, therefore, it was decided to advance the research on geochemical exploration techniques which are relatively simple and can be carried out with low cost. When the techniques of geochemistry are used, for example, in the case that there are hot springs or fumaroles, the temperature, origin, properties and so on of underground hot water reservoirs can be estimated from their chemical composition. The method of examining the mercury concentration in soil and soil air has been in practical use in the geothermal districts where the ground surface symptom lacks. This time, the method of investigation using radon, thoron and gamma ray as the exploration indices was newly studied. The index compositions for geochemical exploration, new exploration index compositions, the method of measurement, the basic investigation and on-the-spot investigation are reported. (Kako, I.)

  12. Geothermal exploration using the magnetotelluric method

    NARCIS (Netherlands)

    van Leeuwen, W.A.

    2016-01-01

    One of the requirements to realize electricity production from geothermal energy in the Netherlands is the exploration of the deep subsurface. Currently, detailed geological information below 5 kilometer is sparse. The magnetotelluric (MT) method, a passive electromagnetic method, is a candidate to

  13. Geothermal energy, what technologies for what purposes?

    International Nuclear Information System (INIS)

    2008-01-01

    This book, fully illustrated and rich of concrete examples, takes stock of the different technologies implemented today to use the Earth's heat: geothermal heat pumps for domestic, tertiary and collective residential uses, geothermal district heating networks and geothermal power plants for power generation. This overview is completed by a description of the future perspectives offered by this renewable energy source in the World and in France in terms of energy independence and technological innovation: geo-cooling, hybrid systems, absorption heat pumps or stimulated geothermal systems. (J.S.)

  14. Geothermal Program Review XI: proceedings. Geothermal Energy - The Environmental Responsible Energy Technology for the Nineties

    Energy Technology Data Exchange (ETDEWEB)

    1993-10-01

    These proceedings contain papers pertaining to current research and development of geothermal energy in the USA. The seven sections of the document are: Overview, The Geysers, Exploration and Reservoir Characterization, Drilling, Energy Conversion, Advanced Systems, and Potpourri. The Overview presents current DOE energy policy and industry perspectives. Reservoir studies, injection, and seismic monitoring are reported for the geysers geothermal field. Aspects of geology, geochemistry and models of geothermal exploration are described. The Drilling section contains information on lost circulation, memory logging tools, and slim-hole drilling. Topics considered in energy conversion are efforts at NREL, condensation on turbines and geothermal materials. Advanced Systems include hot dry rock studies and Fenton Hill flow testing. The Potpourri section concludes the proceedings with reports on low-temperature resources, market analysis, brines, waste treatment biotechnology, and Bonneville Power Administration activities. Selected papers have been indexed separately for inclusion in the Energy Science and Technology Database.

  15. Cerro Prieto geothermal field: exploration during exploitation

    Energy Technology Data Exchange (ETDEWEB)

    1982-07-01

    Geological investigations at Momotombo included photogeology, field mapping, binocular microscope examination of cuttings, and drillhole correlations. Among the geophysical techniques used to investigate the field sub-structure were: Schlumberger and electromagnetic soundings, dipole mapping and audio-magnetotelluric surveys, gravity and magnetic measurements, frequency domain soundings, self-potential surveys, and subsurface temperature determinations. The geochemical program analyzed the thermal fluids of the surface and in the wells. The description and results of exploration methods used during the investigative stages of the Momotombo Geothermal Field are presented. A conceptual model of the geothermal field was drawn from the information available at each exploration phase. The exploration methods have been evaluated with respect to their contributions to the understanding of the field and their utilization in planning further development.

  16. Report on fiscal 1999 survey for geothermal exploration technology verification. Survey of deep-seated geothermal resources; 1999 nendo chinetsu tansa gijutsu nado kensho chosa hokokusho. Shinbu chinetsu shigen chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    To promote the development of deep-seated geothermal resources in a rationalized way, studies were conducted about deep-seated geothermal resource assessment techniques, development guidelines, and the like. For the development of techniques for estimating deep-seated geothermal reservoir parameters, the Uenotai district, Akita Prefecture, and the Hatchobaru district, Oita Prefecture, were designated as model fields, and a geothermal system conceptual model was fabricated. Data of the two districts were registered in a database. Using these data, verification was performed of the validity of stochastic estimation techniques, large area flow simulation, rock/water equilibrium reaction simulation, and the like. As for the technique of deep-seated resource amount estimation, a simplified reservoir model was experimentally constructed based on parameters determined by the stochastic estimation of deep-seated reservoirs and on the conceptual model, and a method was studied for TOUGH2-based production prediction. Studies were also made about deep-seated geothermal resource development guidelines, such as exploration guidelines, exploration well boring guidelines, and geothermal fluid production guidelines. (NEDO)

  17. Exploration technology

    Energy Technology Data Exchange (ETDEWEB)

    Roennevik, H.C. [Saga Petroleum A/S, Forus (Norway)

    1996-12-31

    The paper evaluates exploration technology. Topics discussed are: Visions; the subsurface challenge; the creative tension; the exploration process; seismic; geology; organic geochemistry; seismic resolution; integration; drilling; value creation. 4 refs., 22 figs.

  18. National Geothermal Data System: Transforming the Discovery, Access, and Analytics of Data for Geothermal Exploration

    Energy Technology Data Exchange (ETDEWEB)

    Patten, Kim [Arizona Geological Survey

    2013-05-01

    data are insufficient for promoting geothermal exploration. Authors of this paper are Arlene Anderson, US DOE Geothermal Technologies Office, David Blackwell, Southern Methodist University (SMU), Cathy Chickering (SMU), Toni Boyd, Oregon Institute of Technology’s GeoHeat Center, Roland Horne, Stanford University, Matthew MacKenzie, Uberity, Joe Moore, University of Utah, Duane Nickull, Uberity, Stephen Richard, Arizona Geological Survey, and Lisa Shevenell, University of Nevada, Reno. “NGDS User Centered Design: Meeting the Needs of the Geothermal Community,” discusses the user- centered design approach taken in the development of a user interface solution for the NGDS. The development process is research based, highly collaborative, and incorporates state-of-the-art practices to ensure a quality user interface for the widest and greatest utility. Authors of this paper are Harold Blackman, Boise State University, Suzanne Boyd, Anthro-Tech, Kim Patten, Arizona Geological Survey, and Sam Zheng, Siemens Corporate Research. “Fueling Innovation and Adoption by Sharing Data on the DOE Geothermal Data Repository Node on the National Geothermal Data System,” describes the motivation behind the development of the Geothermal Data Repository (GDR) and its role in the NGDS. This includes the benefits of using the GDR to share geothermal data of all types and DOE’s data submission process. Authors of this paper are Jon Weers, National Renewable Energy Laboratory and Arlene Anderson, US DOE Geothermal Technologies Office. Finally, “Developing the NGDS Adoption of CKAN for Domestic & International Data Deployment,” provides an overview of the “Node-In-A-Box” software package designed to provide data consumers with a highly functional interface to access the system, and to ease the burden on data providers who wish to publish data in the system. It is important to note that this software package constitutes a reference implementation and that the NGDS architecture

  19. 2013 Geothermal Technologies Office Annual Report

    Energy Technology Data Exchange (ETDEWEB)

    none,

    2014-02-01

    For the Geothermal Technologies Office (GTO), 2013 was a year of major achievements and repositioning to introduce major initiatives. Read all about our progress and successes this year, and as we look ahead, our new opportunities and initiatives.

  20. Geothermal Technologies Program Overview - Peer Review Program

    Energy Technology Data Exchange (ETDEWEB)

    Milliken, JoAnn [Office of Energy Efficiency and Renewable Energy (EERE), Washington, DC (United States)

    2011-06-06

    This Geothermal Technologies Program presentation was delivered on June 6, 2011 at a Program Peer Review meeting. It contains annual budget, Recovery Act, funding opportunities, upcoming program activities, and more.

  1. Geothermal Exploration in Hot Springs, Montana

    Energy Technology Data Exchange (ETDEWEB)

    Toby McIntosh, Jackola Engineering

    2012-09-26

    The project involves drilling deeper in the Camp Aqua well dri lled in June 1982 as part of an effort to develop an ethanol plant. The purpose of the current drill ing effort is to determine if water at or above 165°F exists for the use in low temperature resource power generation. Previous geothermal resource study efforts in and around Hot Springs , MT and the Camp Aqua area (NE of Hot Springs) have been conducted through the years. A confined gravel aquifer exists in deep alluvium overlain by approximately 250 of si lt and c lay deposits from Glacial Lake Missoula. This gravel aquifer overlies a deeper bedrock aquifer. In the Camp Aqua area several wel l s exist in the gravel aquifer which receives hot water f rom bedrock fractures beneath the area. Prior to this exploration, one known well in the Camp Aqua area penetrated into the bedrock without success in intersecting fractures transporting hot geothermal water. The exploration associated with this project adds to the physical knowledge database of the Camp Aqua area. The dri l l ing effort provides additional subsurface information that can be used to gain a better understanding of the bedrock formation that i s leaking hot geothermal water into an otherwise cold water aquifer. The exi s t ing well used for the explorat ion is located within the center of the hottest water within the gravel aquifer. This lent i t sel f as a logical and economical location to continue the exploration within the existing well. Faced with budget constraints due to unanticipated costs, changing dril l ing techniques stretched the limited project resources to maximize the overa l l well depth which f e l l short of original project goals. The project goal of finding 165°F or hotter water was not achieved; however the project provides additional information and understanding of the Camp Aqua area that could prove valuable in future exploration efforts

  2. Geothermal resources: exploration and exploitation. A bibliography

    Energy Technology Data Exchange (ETDEWEB)

    1976-07-01

    This comprehensive bibliography contains 5476 citations of foreign and domestic research reports, journal articles, patents, conference proceedings, and books concerned with the exploration and exploitation of geothermal resources. The coverage dates back as far as useful references could be obtained and extends through June 1976. References are arranged in broad subject categories and are made up of complete bibliographic citations. These are followed by a listing of subject descriptors used to describe the subject content of each reference. Four indexes are included: Corporate, Personal Author, Subject, and Report Number. Also included is a list of journals from which articles were selected. (LBS)

  3. National Geothermal Data System: A Geothermal Data System for Exploration and Development

    Energy Technology Data Exchange (ETDEWEB)

    Allison, Lee [Executive Office of the State of Arizona (Arizona Geological Survey); Richard, Stephen [Executive Office of the State of Arizona (Arizona Geological Survey); Patten, Kim [Executive Office of the State of Arizona (Arizona Geological Survey); Love, Diane [Executive Office of the State of Arizona (Arizona Geological Survey); Coleman, Celia [Executive Office of the State of Arizona (Arizona Geological Survey); Chen, Genhan [Executive Office of the State of Arizona (Arizona Geological Survey)

    2012-09-30

    Geothermal-relevant geosciences data from all 50 states (www.stategeothermaldata.org), federal agencies, national labs, and academic centers are being digitized and linked in a distributed online network funded by the U.S. Department of Energy Geothermal Data System (GDS) to foster geothermal energy exploration and development through use of interactive online ‘mashups,’data integration, and applications. Emphasis is first to make as much information as possible accessible online, with a long range goal to make data interoperable through standardized services and interchange formats. A growing set of more than thirty geoscience data content models is in use or under development to define standardized interchange formats for: aqueous chemistry, borehole temperature data, direct use feature, drill stem test, seismic event hypocenter, fault feature, geologic contact feature, geologic unit feature, thermal/hot spring description, metadata, quaternary fault, volcanic vent description, well header feature, borehole lithology log, crustal stress, gravity, heat flow/temperature gradient, permeability, and feature description data like developed geothermal systems, geologic unit geothermal characterization, permeability, production data, rock alteration description, rock chemistry, and thermal conductivity. Map services are also being developed for isopach maps, aquifer temperature maps, and several states are working on geothermal resource overview maps. Content models are developed based on existing community datasets to encourage widespread adoption and promulgate content quality standards. Geoscience data and maps from other GDS participating institutions, or “nodes” (e.g., U.S. Geological Survey, Southern Methodist University, Oregon Institute of Technology, Stanford University, the University of Utah) are being supplemented with extensive land management and land use resources from the Western Regional Partnership (15 federal agencies and 5 Western states) to

  4. 2015 Annual Report - Geothermal Technologies Office

    Energy Technology Data Exchange (ETDEWEB)

    None

    2016-04-01

    Over the past year, the U.S. Department of Energy’s (DOE’s) Geothermal Technologies Office (GTO) supported a number of exciting initiatives and research and development (R&D)activities! The GTO budget was increased in Fiscal Years (FY) 2015-2016, providing the opportunity to invest in new technologies and initiatives, such as the DOE-wide Subsurface Crosscut Initiative, and the Small Business Vouchers (SBV)Program, which is focused on growing our small business and national laboratory partnerships. These efforts will continue to advance geothermal as an economically competitive renewable energy.

  5. Exploring for geothermal resources in Greece

    Energy Technology Data Exchange (ETDEWEB)

    Mendrinos, Dimitrios; Choropanitis, Ioannis; Polyzou, Olympia; Karytsas, Constantine [Centre for Renewable Energy Sources and Saving (CRES), 19th km Marathon Avenue, 19009 Pikermi (Greece)

    2010-03-15

    In Greece the geothermal areas are located in regions of Quaternary or Miocene volcanism and in continental basins of high heat flow. The existence of high-temperature (>200 C) resources has been proven by deep drilling on the islands of Milos and Nisyros and inferred on the island of Santorini by its active volcanism. Elsewhere, geological investigations, geochemical analyses of thermal springs and shallow drilling have identified many low-temperature (<100 C) reservoirs, utilized for spas and greenhouse/soil heating. Ternary K-Na-Mg geothermometer data suggest deep, medium-temperature resources (100-200 C) in Sousaki, the islands of Samothraki, Chios and Lesvos, in the basins of Nestos River Delta and Alexandroupolis and in the graben of Sperchios River. In the basins of northern Greece these resources are also inferred from deep oil exploration well data. (author)

  6. 2016 Geothermal Technologies Office Annual Report

    Energy Technology Data Exchange (ETDEWEB)

    None, None

    2017-03-01

    This report highlights project successes and continued efforts in all of our program areas – EGS, Hydrothermal, Low-Temperature, and Systems Analysis – which are flanked by useful tools and resources and links to more information. Such highlights include FORGE and EGS successes, projects reducing geothermal costs and risks, and advancements in technology research and development.

  7. 2014 Annual Report, Geothermal Technologies Office

    Energy Technology Data Exchange (ETDEWEB)

    none,

    2015-03-01

    In 2014, the Geothermal Technologies Office (GTO) made significant gains—increased budgets, new projects, key technology successes, and new staff. The Fiscal Year (FY) 2015 budget is at $55 million—roughly a 20% increase over FY 2014, and a strong vote of confidence in what the sector is doing to advance economically competitive renewable energy. GTO also remains committed to a balanced portfolio, which includes new hydrothermal development, EGS, and targeted opportunities in the low-temperature sector.

  8. FY 2000 report on the verification survey of geothermal exploration technology, etc. Development of the reservoir fluctuation exploration method - Phase 2 (Feasibility survey); 2000 nendo chinetsu tansa gijutsu nado kensho chosa hokokusho. Choryuso hendo tansaho kaihatsu phase 2 F/S chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    For the purpose of developing the technology to grasp the behavior of geothermal fluids flowing inside the deep-seated reservoir, study of subjects was made for the reservoir fluctuation exploration method - Phase 2. In the overview of the reservoir fluctuation exploration method - Phase 1, various element technologies being developed in Phase 1 were arranged in terms of the overview of technology, results concretely obtained, present subjects, achievement of technical development, etc. In the overview of geothermal fields, domestic geothermal fields and overseas geothermal fields were outlined of which demonstrative tests in Phase 2 can be made. In the survey, data on characteristics of reservoirs at the sites proposed, existing data usable for the project and information of the existing facilities were covered in terms of the those that can be collected being based on the public data. In the study of demonstrative testing fields, to make selection of demonstrative testing fields in Phase 2, selection of conditions was made from the two points of view: 'necessary conditions for demonstrative testing field' and 'comparison in adaptability of geothermal fields by method.' (NEDO)

  9. Rock melting technology and geothermal drilling

    Science.gov (United States)

    Rowley, J. C.

    1974-01-01

    National awareness of the potential future shortages in energy resources has heightened interest in exploration and utilization of a variety of geothermal energy (GTE) reservoirs. The status of conventional drilling of GTE wells is reviewed briefly and problem areas which lead to higher drilling costs are identified and R and D directions toward solution are suggested. In the immediate future, an expanded program of drilling in GTE formations can benefit from improvements in drilling equipment and technology normally associated with oil or gas wells. Over a longer time period, the new rock-melting drill bits being developed as a part of the Los Alamos Scientific Laboratory's Subterrene Program offer new solutions to a number of problems which frequently hamper GTE drilling, including the most basic problem - high temperature. Two of the most favorable characteristics of rock-melting penetrators are their ability to operate effectively in hot rock and produce glass linings around the hole as an integral part of the drilling process. The technical advantages to be gained by use of rock-melting penetrators are discussed in relation to the basic needs for GTE wells.

  10. Application of environmental isotope tracing technology to geothermal geochemistry

    International Nuclear Information System (INIS)

    Shang Yingnan

    2006-01-01

    This paper reviews the recent application and development of environmental isotope tracing technology to geothermal geochemistry in the following aspects: gas isotopes (He, C) tracing of warm springs; H, O isotope tracing on the origin and cause of geothermal water, environmental isotope dating of geothermal water, and the advantage of excess parameter of deuterium (d) in geothermal research. The author also suggests that isotope method should combine with other geological methods to expand its advantage. (authors)

  11. Spatial data analysis for exploration of regional scale geothermal resources

    Science.gov (United States)

    Moghaddam, Majid Kiavarz; Noorollahi, Younes; Samadzadegan, Farhad; Sharifi, Mohammad Ali; Itoi, Ryuichi

    2013-10-01

    Defining a comprehensive conceptual model of the resources sought is one of the most important steps in geothermal potential mapping. In this study, Fry analysis as a spatial distribution method and 5% well existence, distance distribution, weights of evidence (WofE), and evidential belief function (EBFs) methods as spatial association methods were applied comparatively to known geothermal occurrences, and to publicly-available regional-scale geoscience data in Akita and Iwate provinces within the Tohoku volcanic arc, in northern Japan. Fry analysis and rose diagrams revealed similar directional patterns of geothermal wells and volcanoes, NNW-, NNE-, NE-trending faults, hotsprings and fumaroles. Among the spatial association methods, WofE defined a conceptual model correspondent with the real world situations, approved with the aid of expert opinion. The results of the spatial association analyses quantitatively indicated that the known geothermal occurrences are strongly spatially-associated with geological features such as volcanoes, craters, NNW-, NNE-, NE-direction faults and geochemical features such as hotsprings, hydrothermal alteration zones and fumaroles. Geophysical data contains temperature gradients over 100 °C/km and heat flow over 100 mW/m2. In general, geochemical and geophysical data were better evidence layers than geological data for exploring geothermal resources. The spatial analyses of the case study area suggested that quantitative knowledge from hydrothermal geothermal resources was significantly useful for further exploration and for geothermal potential mapping in the case study region. The results can also be extended to the regions with nearly similar characteristics.

  12. The snake geothermal drilling project. Innovative approaches to geothermal exploration

    Energy Technology Data Exchange (ETDEWEB)

    Shervais, John W. [Utah State Univ., Logan, UT (United States); Evans, James P. [Utah State Univ., Logan, UT (United States); Liberty, Lee M. [Boise State Univ., ID (United States); Schmitt, Douglas R. [University of Alberta, Canada; Blackwell, David D. [Southern Methodist Univ., Dallas, TX (United States)

    2014-02-21

    The goal of our project was to test innovative technologies using existing and new data, and to ground-truth these technologies using slim-hole core technology. The slim-hole core allowed us to understand subsurface stratigraphy and alteration in detail, and to correlate lithologies observed in core with surface based geophysical studies. Compiled data included geologic maps, volcanic vent distribution, structural maps, existing well logs and temperature gradient logs, groundwater temperatures, and geophysical surveys (resistivity, magnetics, gravity). New data included high-resolution gravity and magnetic surveys, high-resolution seismic surveys, three slimhole test wells, borehole wireline logs, lithology logs, water chemistry, alteration mineralogy, fracture distribution, and new thermal gradient measurements.

  13. Report on fiscal 2000 survey for geothermal exploration technology verification. Survey of deep-seated geothermal resources; 2000 nendo chinetsu tansa gijutsu nado kensho chosa hokokusho. Shinbu chinetsu shigen chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    To promote the development of deep-seated geothermal resources in a rationalized way, studies are conducted about deep-seated geothermal resource assessment techniques, development guidelines, and the like. Data were collected at the Sumikawa-Onuma district, Ogiri district, Mori district, Yanaizu-Nishiyama district, and the Onikobe district, and compiled into a database to be open to the public. Studies were made about methods for estimating parameters for deep-seated geothermal reservoirs. The resultant findings indicate that, in the Uenotai and Sumikawa-Onuma districts where geothermal reservoirs are governed mainly by a fracture network, the relaxation method and extrapolation will be effective for deep-seated reservoir temperature estimation, and the ascending current analysis method and extrapolation for permeability estimation. The findings also indicate that the expanse of deep-seated reservoirs will be suitably estimated using a method similar to that applied to shallow-seated reservoirs. In the study of the estimation of the amount of deep-seated geothermal resources, it is concluded that the simplified model A will be effective in dealing with a geothermal district where there is a well-developed fracture network and the simplified model B in dealing with a geothermal district where supply of deep-seated fluid governed by an extensive fault prevails. (NEDO)

  14. 2013 Geothermal Technologies Office Peer Review Report

    Energy Technology Data Exchange (ETDEWEB)

    Geothermal Technologies Office

    2014-01-01

    Geothermal Technologies Office conducted its annual program peer review in April of 2013. The review provided an independent, expert evaluation of the technical progress and merit of GTO-funded projects. Further, the review was a forum for feedback and recommendations on future GTO strategic planning. During the course of the peer review, DOE-funded projects were evaluated for 1) their contribution to the mission and goals of the GTO and 2) their progress against stated project objectives. Principal Investigators (PIs) came together in sessions organized by topic “tracks” to disseminate information, progress, and results to a panel of independent experts as well as attendees.

  15. Geothermal Technologies Program 2011 Peer Review Report

    Energy Technology Data Exchange (ETDEWEB)

    Hollett, Douglas [Energy Efficiency and Renewable Energy (EERE), Washington, DC (United States); Stillman, Greg [Energy Efficiency and Renewable Energy (EERE), Washington, DC (United States)

    2011-06-01

    On June 6-10, 2011, the U.S. Department of Energy (DOE), Office of Energy Efficiency and Renewable Energy (EERE), Geothermal Technologies Program (GTP or the Program) conducted its annual program peer review in Bethesda, Maryland. In accordance with the EERE Peer Review Guide, the review provides an independent, expert evaluation of the strategic goals and direction of the program and is a forum for feedback and recommendations on future program planning. The purpose of the review was to evaluate DOE-funded projects for their contribution to the mission and goals of the Program and to assess progress made against stated objectives.

  16. Assessment of New Approaches in Geothermal Exploration Decision Making: Preprint

    Energy Technology Data Exchange (ETDEWEB)

    Akar, S.; Young, K. R.

    2015-02-01

    Geothermal exploration projects have significant amount of risk associated with uncertainties encountered in the discovery of the geothermal resource. Understanding when and how to proceed in an exploration program, and when to walk away from a site, are two of the largest challenges for increased geothermal deployment. Current methodologies for exploration decision making is left to subjective by subjective expert opinion which can be incorrectly biased by expertise (e.g. geochemistry, geophysics), geographic location of focus, and the assumed conceptual model. The aim of this project is to develop a methodology for more objective geothermal exploration decision making at a given location, including go-no-go decision points to help developers and investors decide when to give up on a location. In this scope, two different approaches are investigated: 1) value of information analysis (VOIA) which is used for evaluating and quantifying the value of a data before they are purchased, and 2) enthalpy-based exploration targeting based on reservoir size, temperature gradient estimates, and internal rate of return (IRR). The first approach, VOIA, aims to identify the value of a particular data when making decisions with an uncertain outcome. This approach targets the pre-drilling phase of exploration. These estimated VOIs are highly affected by the size of the project and still have a high degree of subjectivity in assignment of probabilities. The second approach, exploration targeting, is focused on decision making during the drilling phase. It starts with a basic geothermal project definition that includes target and minimum required production capacity and initial budgeting for exploration phases. Then, it uses average temperature gradient, reservoir temperature estimates, and production capacity to define targets and go/no-go limits. The decision analysis in this approach is based on achieving a minimum IRR at each phase of the project. This second approach was

  17. A Technology Roadmap for Strategic Development of Enhanced Geothermal Systems

    Energy Technology Data Exchange (ETDEWEB)

    Ziagos, John [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Phillips, Benjamin R. [SRA International, Inc. and Geothermal Technologies Office, Washington, DC (United States); Boyd, Lauren [Geothermal Technologies Office, Washington, DC (United States); Jelacic, Allan [SRA International, Inc., Washington, DC (United States); Stillman, Greg [Geothermal Technologies Office, Washington, DC (United States); Hass, Eric [U.S. DOE, Golden, CO (United States)

    2013-02-13

    Realization of EGS development would make geothermal a significant contender in the renewable energy portfolio, on the order of 100+ GWe in the United States alone. While up to 90% of the geothermal power resource in the United States is thought to reside in Enhanced Geothermal Systems (EGS), hurdles to commercial development still remain. The Geothermal Technologies Office, U.S. Department of Energy (DOE), began in 2011 to outline opportunities for advancing EGS technologies on five- to 20-year timescales, with community input on the underlying technology needs that will guide research and ultimately determine commercial success for EGS. This report traces DOE's research investments, past and present, and ties them to these technology needs, forming the basis for an EGS Technology Roadmap to help guide future DOE research. This roadmap is currently open for public comment. Send your comments to geothermal@ee.doe.gov.

  18. Geothermal Technologies Program Geoscience and Supporting Technologies 2001 University Research Summaries

    International Nuclear Information System (INIS)

    Creed, R.J.; Laney, P.T.

    2002-01-01

    The U.S. Department of Energy Office of Wind and Geothermal Technologies (DOE) is funding advanced geothermal research through University Geothermal Research solicitations. These solicitations are intended to generate research proposals in the areas of fracture permeability location and characterization, reservoir management and geochemistry. The work funded through these solicitations should stimulate the development of new geothermal electrical generating capacity through increasing scientific knowledge of high-temperature geothermal systems. In order to meet this objective researchers are encouraged to collaborate with the geothermal industry. These objectives and strategies are consistent with DOE Geothermal Energy Program strategic objectives

  19. Geothermal Technologies Program Geoscience and Supporting Technologies 2001 University Research Summaries

    Energy Technology Data Exchange (ETDEWEB)

    Creed, R.J.; Laney, P.T.

    2002-05-14

    The U.S. Department of Energy Office of Wind and Geothermal Technologies (DOE) is funding advanced geothermal research through University Geothermal Research solicitations. These solicitations are intended to generate research proposals in the areas of fracture permeability location and characterization, reservoir management and geochemistry. The work funded through these solicitations should stimulate the development of new geothermal electrical generating capacity through increasing scientific knowledge of high-temperature geothermal systems. In order to meet this objective researchers are encouraged to collaborate with the geothermal industry. These objectives and strategies are consistent with DOE Geothermal Energy Program strategic objectives.

  20. Geothermal Technologies Program Geoscience and Supporting Technologies 2001 University Research Summaries

    Energy Technology Data Exchange (ETDEWEB)

    Creed, Robert John; Laney, Patrick Thomas

    2002-06-01

    The U.S. Department of Energy Office of Wind and Geothermal Technologies (DOE) is funding advanced geothermal research through University Geothermal Research solicitations. These solicitations are intended to generate research proposals in the areas of fracture permeability location and characterization, reservoir management and geochemistry. The work funded through these solicitations should stimulate the development of new geothermal electrical generating capacity through increasing scientific knowledge of high-temperature geothermal systems. In order to meet this objective researchers are encouraged to collaborate with the geothermal industry. These objectives and strategies are consistent with DOE Geothermal Energy Program strategic objectives.

  1. Exploring public engagement with geothermal energy in southern Italy: A case study

    International Nuclear Information System (INIS)

    Pellizzone, Anna; Allansdottir, Agnes; De Franco, Roberto; Muttoni, Giovanni; Manzella, Adele

    2015-01-01

    This paper presents the results of an assessment of public views on eventual geothermal energy development in Sicily. The research was carried out under a much wider research project, VIGOR, with the aim to explore the feasibility of geothermal energy utilization in southern Italy. This study has two primary objectives: (1) to explore the views and opinions of local communities regarding the potential of geothermal energy applications; (2) to contribute to the growing literature on public engagement with energy issues. In order to explore public views towards geothermal technologies, we conducted a case study using both qualitative and quantitative methods. Although Italy has enormous geological potential for geothermal energy production, levels of knowledge of this energy source amongst the public are low. The results indicate that the issue is shrouded in uncertainty and that the Sicilian public expresses a diffused lack of trust in decision-making processes. Taken together, these factors are likely to strongly impact eventual further developments in this sector. The results clearly show the need for further societal dialogue supported by a sound communication action strategy as the first stage in a public participation

  2. Bibliography: injection technology applicable to geothermal utilization

    Energy Technology Data Exchange (ETDEWEB)

    Darnell, A.J.; Eichelberger, R.L.

    1982-03-19

    This bibliography cites 500 documents that may be helpful in planning, analysis, research, and development of the various aspects of injection technology in geothermal applications. These documents include results from government research; development, demonstration, and commercialization programs; selected references from the literature; symposia; references from various technical societies and installations; reference books; reviews; and other selected material. The cited references are from (1) subject searching, using indexing, storage, and retrieval information data base of the Department of Energy's Technical Information Center's on-line retrieval system, RECON; (2) searches of references from the RECON data base, of work by authors known to be active in the field of geothermal energy research and development; (3) subject and author searches by the computerized data storage and retrieval system of Chemical Abstracts, American Chemical Society, Washington, DC; and (4) selected references from texts and reviews on this subject. Each citation includes title, author, author affiliation, date of publication, and source. The citations are listed in chronological order (most recent first) in each of the subject categories for which this search was made. The RECON accession number is also given.

  3. Geothermal Technologies Office 2012 Peer Review Report

    Energy Technology Data Exchange (ETDEWEB)

    none,

    2013-04-01

    On May 7-10, 2012, the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Geothermal Technologies Office conducted its annual program peer review in Westminster, CO. In accordance with the EERE Peer Review Guide, the review provides an independent, expert evaluation of the strategic goals and direction of the office and is a forum for feedback and recommendations on future office planning. The purpose of the review was to evaluate DOE-funded projects for their contribution to the mission and goals of the office and to assess progress made against stated objectives. Project scoring results, expert reviewer comments, and key findings and recommendations are included in this report.

  4. United States geothermal technology: Equipment and services for worldwide applications

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1995-05-01

    This document has two intended audiences. The first part, ``Geothermal Energy at a Glance,`` is intended for energy system decision makers and others who are interested in wide ranging aspects of geothermal energy resources and technology. The second part, ``Technology Specifics,`` is intended for engineers and scientists who work with such technology in more detailed ways. The glossary at the end of the document defines many of the specialized terms. A directory of US geothermal industry firms who provide goods and services for clients around the world is available on request.

  5. Exploration and comparison of geothermal areas in Indonesia by fluid-rock geochemistry

    NARCIS (Netherlands)

    Deon, F.; Barnhoorn, A.; Lievens, C.; Saptadij, N.; Sutopo, S.; van der Meer, F; den Hartog, T.; Brehmer, M; Bruhn, D.F.; de Jong, M; Ryannugroho, R.; Hutami, R.; Sule, R.; Hecker, C.; Bonté, D

    2016-01-01

    Indonesia with its large, but partially unexplored geothermal potential is one of the most interesting and suitable places in the world to conduct geothermal exploration research.
    This study focuses on geothermal exploration based on fluid-rock geochemistry/geomechanics and aims to compile an

  6. Numerical modeling of regional stress distributions for geothermal exploration

    Science.gov (United States)

    Guillon, Theophile; Peter-Borie, Mariane; Gentier, Sylvie; Blaisonneau, Arnold

    2017-04-01

    Any high-enthalpy unconventional geothermal projectcan be jeopardized by the uncertainty on the presence of the geothermal resource at depth. Indeed, for the majority of such projects the geothermal resource is deeply seated and, with the drilling costs increasing accordingly, must be located as precisely as possible to increase the chance of their economic viability. In order to reduce the "geological risk", i.e., the chance to poorly locate the geothermal resource, a maximum amount of information must be gathered prior to any drilling of exploration and/or operational well. Cross-interpretation from multiple disciplines (e.g., geophysics, hydrology, geomechanics …) should improve locating the geothermal resource and so the position of exploration wells ; this is the objective of the European project IMAGE (grant agreement No. 608553), under which the work presented here was carried out. As far as geomechanics is concerned, in situ stresses can have a great impact on the presence of a geothermal resource since they condition both the regime within the rock mass, and the state of the major fault zones (and hence, the possible flow paths). In this work, we propose a geomechanical model to assess the stress distribution at the regional scale (characteristic length of 100 kilometers). Since they have a substantial impact on the stress distributions and on the possible creation of regional flow paths, the major fault zones are explicitly taken into account. The Distinct Element Method is used, where the medium is modeled as fully deformable blocks representing the rock mass interacting through mechanically active joints depicting the fault zones. The first step of the study is to build the model geometry based on geological and geophysical evidences. Geophysical and structural geology results help positioning the major fault zones in the first place. Then, outcrop observations, structural models and site-specific geological knowledge give information on the fault

  7. Geothermal Technologies Office FY 2017 Budget At-A-Glance

    Energy Technology Data Exchange (ETDEWEB)

    None

    2016-03-01

    The Geothermal Technologies Office (GTO) accelerates deployment of clean, domestic geothermal energy by supporting innovative technologies that reduce the cost and risks of development. This abundant resource generates energy around the clock and has the potential to supply more than 100 GWe of electricity—roughly one-tenth of America’s energy demand. By optimizing the value stream for electricity production and cascaded uses, the office aims to make geothermal energy a fully cost-competitive, widely available, and geographically diverse component of the national energy mix.

  8. Technology, market and policy aspects of geothermal energy in Europe

    Science.gov (United States)

    Shortall, Ruth; Uihlein, Andreas

    2017-04-01

    The Strategic Energy Technology Plan (SET-Plan) is the technology pillar of the EU's energy and climate policy. The goal of the SET-Plan is to achieve EU worldwide leadership in the production of energy technological solutions capable of delivering EU 2020 and 2050 targets for a low carbon economy. The Joint Research Centre (JRC) runs and manages the SET-Plan Information System (SETIS) to support the SET-Plan. Under SETIS, the JRC publishes a number of regularly updated key references on the state of low carbon technology, research and innovation in Europe. Within the framework of the SET-Plan, the geothermal sector is placed into context with other power and heat generation technologies. The talk will give an introduction to some of JRC's geothermal research activities. Amongst others, the JRC Geothermal status report will be presented. This report aims to contribute to the general knowledge about the geothermal sector, its technology, economics and policies, with a focus on innovation, research, development and deployment activities as well as policy support schemes within the European Union. The speech will present the main findings of the report, providing an overview of the activities and progress made by the geothermal energy sector, the status of its sub-technologies and current developments. In addition, the speech will discuss the economic, market and policy aspects of geothermal energy for power production, direct use and ground source heat pumps in Europe and beyond.

  9. Technology and economics of near-surface geothermal resources exploitation

    Directory of Open Access Journals (Sweden)

    Э. И. Богуславский

    2017-04-01

    Full Text Available The paper presents economic justification for applicability of near-surface geothermal installations in Luga region, based on results of techno-economic calculations as well as integrated technical and economic comparison of different prediction scenarios of heat supply, both conventional and using geothermal heat pumps (GHP. Construction costs of a near-surface geothermal system can exceed the costs of central heating by 50-100 %. However, operation and maintenance (O&M costs of heat production for geothermal systems are 50-70 % lower than for conventional sources of heating. Currently this technology is very important, it is applied in various countries (USA, Germany, Japan, China etc., and depending on the region both near-surface and deep boreholes are being used. World practice of near-surface geothermal systems application is reviewed in the paper.

  10. Managing Geothermal Exploratory Drilling Risks Drilling Geothermal Exploration and Delineation Wells with Small-Footprint Highly Portable Diamond Core Drills

    Science.gov (United States)

    Tuttle, J.; Listi, R.; Combs, J.; Welch, V.; Reilly, S.

    2012-12-01

    Small hydraulic core rigs are highly portable (truck or scow-mounted), and have recently been used for geothermal exploration in areas such as Nevada, California, the Caribbean Islands, Central and South America and elsewhere. Drilling with slim diameter core rod below 7,000' is common, with continuous core recovery providing native-state geological information to aid in identifying the resource characteristics and boundaries; this is a highly cost-effective process. Benefits associated with this innovative exploration and delineation technology includes the following: Low initial Capital Equipment Cost and consumables costs Small Footprint, reducing location and road construction, and cleanup costs Supporting drill rod (10'/3meter) and tools are relatively low weight and easily shipped Speed of Mobilization and rig up Reduced requirements for support equipment (cranes, backhoes, personnel, etc) Small mud systems and cementing requirements Continuous, simplified coring capability Depth ratings comparable to that of large rotary rigs (up to ~10,000'+) Remote/small-location accessible (flown into remote areas or shipped in overseas containers) Can be scow or truck-mounted This technical presentation's primary goal is to share the technology of utilizing small, highly portable hydraulic coring rigs to provide exploratory drilling (and in some cases, production drilling) for geothermal projects. Significant cost and operational benefits are possible for the Geothermal Operator, especially for those who are pursuing projects in remote locations or countries, or in areas that are either inaccessible or in which a small footprint is required. John D. Tuttle Sinclair Well Products jtuttle@sinclairwp.com

  11. Geothermal Reservoir Well Stimulation Program: technology transfer

    Energy Technology Data Exchange (ETDEWEB)

    1980-05-01

    A literature search on reservoir and/or well stimulation techniques suitable for application in geothermal fields is presented. The literature on stimulation techniques in oil and gas field applications was also searched and evaluated as to its relevancy to geothermal operations. The equivalent low-temperature work documented in the open literature is cited, and an attempt is made to evaluate the relevance of this information as far as high-temperature stimulation work is concerned. Clays play an important role in any stimulation work. Therefore, special emphasis has been placed on clay behavior anticipated in geothermal operations. (MHR)

  12. Reservoir Maintenance and Development Task Report for the DOE Geothermal Technologies Office GeoVision Study.

    Energy Technology Data Exchange (ETDEWEB)

    Lowry, Thomas Stephen [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Finger, John T. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Carrigan, Charles R. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Foris, Adam [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Kennedy, Mack B. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Corbet, Thomas F. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Doughty, Christine A. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Pye, Steven [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Sonnenthal, Eric L. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

    2017-09-01

    This report documents the key findings from the Reservoir Maintenance and Development (RM&D) Task of the U.S. Department of Energy's (DOE), Geothermal Technologies Office (GTO) Geothermal Vision Study (GeoVision Study). The GeoVision Study had the objective of conducting analyses of future geothermal growth based on sets of current and future geothermal technology developments. The RM&D Task is one of seven tasks within the GeoVision Study with the others being, Exploration and Confirmation, Potential to Penetration, Institutional Market Barriers, Environmental and Social Impacts, Thermal Applications, and Hybrid Systems. The full set of findings and the details of the GeoVision Study can be found in the final GeoVision Study report on the DOE-GTO website. As applied here, RM&D refers to the activities associated with developing, exploiting, and maintaining a known geothermal resource. It assumes that the site has already been vetted and that the resource has been evaluated to be of sufficient quality to move towards full-scale development. It also assumes that the resource is to be developed for power generation, as opposed to low-temperature or direct use applications. This document presents the key factors influencing RM&D from both a technological and operational standpoint and provides a baseline of its current state. It also looks forward to describe areas of research and development that must be pursued if the development geothermal energy is to reach its full potential.

  13. Optimizing Geothermal Drilling: Oil and Gas Technology Transfer

    Energy Technology Data Exchange (ETDEWEB)

    Denninger, Kate; Eustes, Alfred; Visser, Charles; Baker, Walt; Bolton, Dan; Bell, Jason; Bell, Sean; Jacobs, Amelia; Nagandran, Uneshddarann; Tilley, Mitch; Quick, Ralph

    2015-09-02

    There is a significant amount of financial risk associated with geothermal drilling. This study of drilling operations seeks opportunities to improve upon current practices and technologies. The scope of this study included analyzing 21 geothermal wells and 21 oil and gas wells. The goal was to determine a 'Perfect Well' using historical data to compare the best oil and gas well to the best geothermal well. Unfortunately, limitations encountered in the study included missing data (bit records, mud information, etc.) and poor data collection practices An online software database was used to format drilling data to IADC coded daily drilling reports and generate figures for analysis. Six major issues have been found in geothermal drilling operations. These problems include lost circulation, rig/ equipment selection, cementing, penetration rate, drilling program, and time management. As a result of these issues, geothermal drilling averaged 56.4 days longer than drilling comparable oil and gas wells in the wells in this study. Roughly $13.9 million was spent on non-productive time in the 21 geothermal wells, compared with only $1.3 million in the oil and gas wells, assuming a cost of $50,000 per day. Comparable events such as drilling the same sized hole, tripping in/out, cementing, and running the same size casing took substantially less time in the oil and gas wells. Geothermal wells were drilled using older and/or less advanced technology to depths less than 10,000 feet, while oil and gas wells reached 12,500 feet faster with purpose built rigs. A new approach is now underway that will optimize drilling programs throughout the drilling industry using Mechanical Specific Energy (MSE) as a tool to realize efficient drilling processes. Potential improvements for current geothermal operations are: the use of electronic records, real time services, and official glossary terms to describe rig operations, and advanced drilling rigs/technology.

  14. Exploration strategy for high temperature geothermal resources in the Philippines - an update

    International Nuclear Information System (INIS)

    Bayrante, L.F.; Ferrer, H.P.; Barnett, P.R.

    1992-01-01

    After nearly two decades of geoscientific-exploration at 45 geothermal areas in the Philippines, the Philippine National Oil Company-Energy Development Corporation (PNOC-EDC) has developed a multi-disciplinary approach for exploring country's geothermal resources. It suitability for crater-hosted magmatic geothermal systems is currently being evaluated in the light of new data from six recently drilled prospects. New techniques are under consideration for future exploration programmes. (auth.). 59 refs.; 5 figs

  15. Technologies for Extracting Valuable Metals and Compounds from Geothermal Fluids

    Energy Technology Data Exchange (ETDEWEB)

    Harrison, Stephen [SIMBOL Materials

    2014-04-30

    Executive Summary Simbol Materials studied various methods of extracting valuable minerals from geothermal brines in the Imperial Valley of California, focusing on the extraction of lithium, manganese, zinc and potassium. New methods were explored for managing the potential impact of silica fouling on mineral extraction equipment, and for converting silica management by-products into commercial products.` Studies at the laboratory and bench scale focused on manganese, zinc and potassium extraction and the conversion of silica management by-products into valuable commercial products. The processes for extracting lithium and producing lithium carbonate and lithium hydroxide products were developed at the laboratory scale and scaled up to pilot-scale. Several sorbents designed to extract lithium as lithium chloride from geothermal brine were developed at the laboratory scale and subsequently scaled-up for testing in the lithium extraction pilot plant. Lithium The results of the lithium studies generated the confidence for Simbol to scale its process to commercial operation. The key steps of the process were demonstrated during its development at pilot scale: 1. Silica management. 2. Lithium extraction. 3. Purification. 4. Concentration. 5. Conversion into lithium hydroxide and lithium carbonate products. Results show that greater than 95% of the lithium can be extracted from geothermal brine as lithium chloride, and that the chemical yield in converting lithium chloride to lithium hydroxide and lithium carbonate products is greater than 90%. The product purity produced from the process is consistent with battery grade lithium carbonate and lithium hydroxide. Manganese and zinc Processes for the extraction of zinc and manganese from geothermal brine were developed. It was shown that they could be converted into zinc metal and electrolytic manganese dioxide after purification. These processes were evaluated for their economic potential, and at the present time Simbol

  16. Geothermal Reservoir Well Stimulation Program: technology transfer

    Energy Technology Data Exchange (ETDEWEB)

    1980-05-01

    Each of the following types of well stimulation techniques are summarized and explained: hydraulic fracturing; thermal; mechanical, jetting, and drainhole drilling; explosive and implosive; and injection methods. Current stimulation techniques, stimulation techniques for geothermal wells, areas of needed investigation, and engineering calculations for various techniques. (MHR)

  17. New energy technologies 3 - Geothermal and biomass energies

    International Nuclear Information System (INIS)

    Sabonnadiere, J.C.; Alazard-Toux, N.; His, S.; Douard, F.; Duplan, J.L.; Monot, F.; Jaudin, F.; Le Bel, L.; Labeyrie, P.

    2007-01-01

    This third tome of the new energy technologies handbook is devoted to two energy sources today in strong development: geothermal energy and biomass fuels. It gives an exhaustive overview of the exploitation of both energy sources. Geothermal energy is presented under its most common aspects. First, the heat pumps which encounter a revival of interest in the present-day context, and the use of geothermal energy in collective space heating applications. Finally, the power generation of geothermal origin for which big projects exist today. The biomass energies are presented through their three complementary aspects which are: the biofuels, in the hypothesis of a substitutes to fossil fuels, the biogas, mainly produced in agricultural-type facilities, and finally the wood-fuel which is an essential part of biomass energy. Content: Forewords; geothermal energy: 1 - geothermal energy generation, heat pumps, direct heat generation, power generation. Biomass: 2 - biofuels: share of biofuels in the energy context, present and future industries, economic and environmental status of biofuel production industries; 3 - biogas: renewable natural gas, involuntary bio-gases, man-controlled biogas generation, history of methanation, anaerobic digestion facilities or biogas units, biogas uses, stakes of renewable natural gas; 4 - energy generation from wood: overview of wood fuels, principles of wood-energy conversion, wood-fueled thermal energy generators. (J.S.)

  18. Research on the exploration and use of geothermal energy in Austria

    Energy Technology Data Exchange (ETDEWEB)

    1976-01-01

    The current status of geothermal exploration and utilization in Austria is reviewed. Geological characteristics of geothermal fields are discussed in general, as are exploration techniques including geological surveys, geophysical surveys, remote sensing, geochemical surveys, and test drilling. The geology of Austria is described in detail, and the economic and legal problems peculiar to Austria are discussed. Certain regions may be suitable for geothermal exploitation including the Vienna basin. Research and economic recommendations are made. Three figures one table, and thirty references are provided.

  19. Fiscal 1999 research and verification of geothermal energy exploring technologies and the like. Development of reservoir mass and heat flow characterization (Development of seismic monitoring technology - Summary); 1999 nendo chinetsu tansa gijutsu nado kensho chosa hokokusho (yoyaku). Choryuso hendo tansaho kaihatsu (jishinha tansaho kaihatsu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    Development is under way of a reservoir mass and heat flow characterization method using seismic wave analysis. Specifics of the endeavor cover detailed studies of techniques for monitoring and analyzing seismic wave changes due to changes in the reservoir that accompanies production and reinjection of geothermal fluids, which are carried out through preliminary monitoring accomplished at the test field. For the construction of a microearthquake monitoring network, a monitoring network design is prepared, a data processing/analyzing system is improved and tested for serviceability, analysis programs for 3-dimensional velocity structure analysis technology are improved, and methods for analyzing changes in the reservoir are deliberated, all these based on the results of microearthquake preliminary monitoring and simulation carried out at the Akinomiya district, Akita Prefecture. For the research of elastic wave velocity structure change, short-duration reflection events and waveform changes due to geothermal power plant periodic inspections are extracted, and studies are conducted about the applicability of the diffraction stacking method to the exploration of geothermal energy. (NEDO)

  20. Fiscal 1997 report on the survey of verification of geothermal exploration technology, etc. 1. Development of the reservoir variation exploration method (development of the fracture hydraulic exploration method); 1997 nendo chinetsu tansa gijutsu nado kensho chosa. Choryuso hendo tansaho kaihatsu (danretsu suiri tansaho kaihatsu) hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    The paper described the fiscal 1997 result of the fracture hydraulic exploration method as the variation exploration method of geothermal reservoirs. By elucidating hydraulic characteristics of the fracture system forming reservoir, technologies are established which are effective for the reservoir evaluation in early stages of development, maintenance of stable power after operational start-up, and extraction of peripheral reservoirs. As for the pressure transient test method, a test supporting system was basically designed to obtain high accuracy hydraulic parameters. As to the tiltmeter fracture monitoring method, a simulation was made for distribution of active fractures and evaluation of hydraulic constants without drilling wells. In relation to the two-phase flow measuring method, for stable steam production, the use of the orifice plate, the existing flow measuring method, etc. was forecast as a simple measuring method of the two-phase state of reservoir. Concerning the hydrophone VSP method, a feasibility study was made of the practical VSP for high temperature which can analyze hydraulic characteristics and geological structures around the well at the same time which the existing methods were unable to grasp, and brought the results. Moreover, to make high accuracy reservoir modeling possible, Doppler borehole televiewer was made in each reservoir. 80 refs., 147 figs., 22 tabs.

  1. The concept of geothermal exploration in west Java based on geophysical data

    Science.gov (United States)

    Gaffar, Eddy Z.

    2018-02-01

    Indonesia has the largest geothermal prospects in the world and most of them are concentrated in Java and Sumatera. The ones on Sumatra island are generally controlled by Sumatra Fault, either the main fault or the second and the third order fault. Geothermal in Java is still influenced by the subduction of oceanic plates from the south of Java island that forms the southern mountains extending from West Java to East Java. From a geophysical point of view, there is still no clue or concept that accelerates the process of geothermal exploration. The concept is that geothermal is located around the volcano (referred to the volcano as a host) and around the fault (fault as a host). There is another method from remote sensing analysis that often shows circular feature. In a study conducted by LIPI, we proposed a new concept for geothermal exploration which is from gravity analysis using Bouguer anomaly data from Java Island, which also show circular feature. The feature is supposed to be an "ancient crater" or a hidden caldera. Therefore, with this hypothesis, LIPI Geophysics team will try to prove whether this symptom can help accelerate the process of geothermal exploration on the island of West Java. Geophysical methods might simplify the exploration of geothermal prospect in West Java. Around the small circular feature, there are some large geothermal prospect areas such as Guntur, Kamojang, Drajat, Papandayan, Karaha Bodas, Patuha. The concept proposed by our team will try be applied to explore geothermal in Java Island for future work.

  2. Geothermal Technology: A Smart Way to Lower Energy Bills

    Science.gov (United States)

    Calahan, Scott

    2007-01-01

    Heating costs for both natural gas and oil have risen dramatically in recent years--and will likely continue to do so. Consequently, it is important that students learn not only about traditional heating technology, but also about the alternative methods that will surely grow in use in the coming years. One such method is geothermal. In this…

  3. Optimizing Geothermal Drilling: Oil and Gas Technology Transfer

    Energy Technology Data Exchange (ETDEWEB)

    Tilley, Mitch; Eustes, Alfred; Visser, Charles; Baker, Walt; Bolton, Dan; Bell, Jason; Nagandran, Uneshddarann; Quick, Ralph

    2015-01-26

    There is a significant amount of financial risk associated with geothermal drilling; however, there are opportunities to improve upon current practices and technologies used. The scope of this drilling operational study included 21 geothermal wells and 21 oil and gas wells. The goal was to determine a 'perfect well' using historical data to compare the best oil and gas well to the best geothermal well. Unfortunately, limitations encountered in the study included missing data (bit records, mud information, etc.), poor data collection, and difficult to ascertain handwriting. An online software database was used to format drilling data to IADC coded daily drilling reports and generate analysis figures. Six major issues have been found in geothermal drilling operations. These problems include lost circulation, rig/equipment selection, cementing, penetration rate, drilling program, and time management. As a result of these issues, geothermal drilling averages 56.4 days longer than drilling comparable oil and gas wells in the wells in this study. Roughly $13.9 million would be lost due to non-productive time in the 21 geothermal wells and only $1.3 million in the oil and gas wells, assuming a cost of $50,000 per day. Comparable events such as drilling the same sized hole, tripping in/out, cementing, and running the same size casing took substantially less time in the oil and gas wells. Geothermal wells were drilled using older and/or less advanced technology to depths less than 10,000 feet, while oil and gas wells reached 12,500 feet faster with purpose built rigs. A new approach is now underway that will optimize drilling programs throughout the drilling industry. It is the use of Mechanical Specific Energy (MSE) as a tool to realize efficient drilling processes. However, a work-flow must also be established in order for there to be an efficient drilling program. Potential improvements for current geothermal operations are: the use of electronic records, real

  4. Daemen Alternative Energy/Geothermal Technologies Demonstration Program, Erie County

    Energy Technology Data Exchange (ETDEWEB)

    Beiswanger, Robert C. [Daemen College, Amherst, NY (United States)

    2013-02-28

    The purpose of the Daemen Alternative Energy/Geothermal Technologies Demonstration Project is to demonstrate the use of geothermal technology as model for energy and environmental efficiency in heating and cooling older, highly inefficient buildings. The former Marian Library building at Daemen College is a 19,000 square foot building located in the center of campus. Through this project, the building was equipped with geothermal technology and results were disseminated. Gold LEED certification for the building was awarded. 1) How the research adds to the understanding of the area investigated. This project is primarily a demonstration project. Information about the installation is available to other companies, organizations, and higher education institutions that may be interested in using geothermal energy for heating and cooling older buildings. 2) The technical effectiveness and economic feasibility of the methods or techniques investigated or demonstrated. According to the modeling and estimates through Stantec, the energy-efficiency cost savings is estimated at 20%, or $24,000 per year. Over 20 years this represents $480,000 in unrestricted revenue available for College operations. See attached technical assistance report. 3) How the project is otherwise of benefit to the public. The Daemen College Geothermal Technologies Ground Source Heat Pumps project sets a standard for retrofitting older, highly inefficient, energy wasting and environmentally irresponsible buildings that are quite typical of many of the buildings on the campuses of regional colleges and universities. As a model, the project serves as an energy-efficient system with significant environmental advantages. Information about the energy-efficiency measures is available to other colleges and universities, organizations and companies, students, and other interested parties. The installation and renovation provided employment for 120 individuals during the award period. Through the new Center

  5. Geothermal Resource Exploration by Stream pH Mapping in Mutsu Hiuchi Dake Volcano, Japan

    Directory of Open Access Journals (Sweden)

    Yota Suzuki

    2017-07-01

    Full Text Available Although pH measurements of hot spring water are taken in conventional geothermal resource research, previous studies have seldom created pH distribution maps of stream and spring waters for an entire geothermal field as a technique for geothermal exploration. In this study, a pH distribution map was created by measuring stream and spring water pH at 75 sites in the Mutsu Hiuchi Dake geothermal field, Japan. Areas of abnormally high pH were detected in midstream sections of the Ohaka and Koaka rivers; these matched the location of the Mutsu Hiuchi Dake East Slope Fault, which is believed to have formed a geothermal reservoir. The abnormally high pH zone is attributed to the trapping of rising volcanic gases in a mature geothermal reservoir with neutral geothermal water. This causes the gas to dissolve and prevents it from reaching the surface. Thus, the mapping of stream water pH distribution in a geothermal field could provide a new and effective method for estimating the locations of geothermal reservoirs. As the proposed method does not require laboratory analysis, and is more temporally and economically efficient than conventional methods, it might help to promote geothermal development in inaccessible and remote regions.

  6. The National Energy Strategy - The role of geothermal technology development: Proceedings

    Energy Technology Data Exchange (ETDEWEB)

    1990-01-01

    Each year the Geothermal Division of the US Department of Energy conducts an in-depth review of its entire geothermal R D program. The conference serves several purposes: a status report on current R D activities, an assessment of progress and problems, a review of management issues, and a technology transfer opportunity between DOE and the US geothermal industry. Topics in this year's conference included Hydrothermal Energy Conversion Technology, Hydrothermal Reservoir Technology, Hydrothermal Hard Rock Penetration Technology, Hot Dry Rock Technology, Geopressured-Geothermal Technology and Magma Energy Technology. Each individual paper has been cataloged separately.

  7. Geothermal Exploration Policy Mechanisms: Lessons for the United States from International Applications

    Energy Technology Data Exchange (ETDEWEB)

    Speer, Bethany [National Renewable Energy Lab. (NREL), Golden, CO (United States); Economy, Ryan [National Renewable Energy Lab. (NREL), Golden, CO (United States); Lowder, Travis [National Renewable Energy Lab. (NREL), Golden, CO (United States); Schwabe, Paul [National Renewable Energy Lab. (NREL), Golden, CO (United States); Regenthal, Scott [National Renewable Energy Lab. (NREL), Golden, CO (United States)

    2014-05-01

    This report focuses on five of the policy types that are most relevant to the U.S. market and political context for the exploration and confirmation of conventional hydrothermal (geothermal) resources in the United States: (1) drilling failure insurance, (2) loan guarantees, (3) subsidized loans, (4) capital subsidies, and (5) government-led exploration. It describes each policy type and its application in other countries and regions. It offers policymakers a guide for drafting future geothermal support mechanisms for the exploration-drilling phase of geothermal development.

  8. Geothermal Reservoir Technology Research Program: Abstracts of selected research projects

    Energy Technology Data Exchange (ETDEWEB)

    Reed, M.J. (ed.)

    1993-03-01

    Research projects are described in the following areas: geothermal exploration, mapping reservoir properties and reservoir monitoring, and well testing, simulation, and predicting reservoir performance. The objectives, technical approach, and project status of each project are presented. The background, research results, and future plans for each project are discussed. The names, addresses, and telephone and telefax numbers are given for the DOE program manager and the principal investigators. (MHR)

  9. Discovering geothermal supercritical fluids: a new frontier for seismic exploration.

    Science.gov (United States)

    Piana Agostinetti, Nicola; Licciardi, Andrea; Piccinini, Davide; Mazzarini, Francesco; Musumeci, Giovanni; Saccorotti, Gilberto; Chiarabba, Claudio

    2017-11-06

    Exploiting supercritical geothermal resources represents a frontier for the next generation of geothermal electrical power plant, as the heat capacity of supercritical fluids (SCF),which directly impacts on energy production, is much higher than that of fluids at subcritical conditions. Reconnaissance and location of intensively permeable and productive horizons at depth is the present limit for the development of SCF geothermal plants. We use, for the first time, teleseismic converted waves (i.e. receiver function) for discovering those horizons in the crust. Thanks to the capability of receiver function to map buried anisotropic materials, the SCF-bearing horizon is seen as the 4km-depth abrupt termination of a shallow, thick, ultra-high (>30%) anisotropic rock volume, in the center of the Larderello geothermal field. The SCF-bearing horizon develops within the granites of the geothermal field, bounding at depth the vapor-filled heavily-fractured rock matrix that hosts the shallow steam-dominated geothermal reservoirs. The sharp termination at depth of the anisotropic behavior of granites, coinciding with a 2 km-thick stripe of seismicity and diffuse fracturing, points out the sudden change in compressibility of the fluid filling the fractures and is a key-evidence of deep fluids that locally traversed the supercritical conditions. The presence of SCF and fracture permeability in nominally ductile granitic rocks open new scenarios for the understanding of magmatic systems and for geothermal exploitation.

  10. EXPLORATION BY MEANS OF GEOPHYSICAL METHODS OF GEOTHERMAL FIELDS AND CASE STUDIES

    Directory of Open Access Journals (Sweden)

    Züheyr KAMACI

    1997-01-01

    Full Text Available Geothermal energy which is one of the reuseable energy resources, can save as much as 77 million barrels of petroleum equivalent annually when used in the production of electricity and heating-environment. Geophysical exploration methods plays in important role in the fields of geothermal exploration, development and observational studies. Thermal and geoelectrical methods are the most effective methods which shows the temperature variation anomalies and mechanical drilling places. But, when the other methods of gravity, magnetic, radiometric, well geophysics and well logs can be used in conjunction with seismic tomography, apart from the mentioned geophysical exploration method, better results could be obtained. From the above mentioned facts various case history reports are given from our country and worldwide to determine geothermal energy resources by using geophysical exploration technique application. From these results of studies a 55 °C hot water artessian aquifer is found in the Uşak-Banaz geothermal field by applying geoelectrical methods.

  11. Novel use of disequilibrium ages in geothermal energy exploration

    International Nuclear Information System (INIS)

    Goles, G.G.; Seymour, R.S.

    1984-01-01

    Geothermal exploration commonly involves estimation of ages of young volcanic rocks. Few reliable techniques are available for this purpose, uranium-series disequilibrium being one. Several activity ratios may be used to estimate disequilibrium ages. Th-230/U-238 were used because of the convenient half-life of Th-230 and because excess Th-230 in volcanic rocks has been found and used to obtain reasonable ages. By analyzing mafic and felsic fractions of each rock studied, data were obtained to construct quasi-isochrons, assuming that minerals in each fraction had the same initial Th-230/Th-232 activity ratio. Analyses were done via epithermal instrumental activation analysis (Th-232, and U-238) and alpha spectrometry (Th-230 and Th-232), an approach that is simple, rapid and allows explicit estimation of chemical yields. Four rocks from the Oregon High Cascades yielded ages or a limit on age consistent with known geological relations. Several improvements in the method could be implemented without serious impact on its simplicity. 15 references, 1 figure, 1 table

  12. Geothermal Energy Development annual report 1979

    Energy Technology Data Exchange (ETDEWEB)

    1980-08-01

    This report is an exerpt from Earth Sciences Division Annual Report 1979 (LBL-10686). Progress in thirty-four research projects is reported including the following area: geothermal exploration technology, geothermal energy conversion technology, reservoir engineering, and geothermal environmental research. Separate entries were prepared for each project. (MHR)

  13. Fluid-rock geochemical interaction for modelling calibration in geothermal exploration in Indonesia

    Science.gov (United States)

    Deon, Fiorenza; Barnhoorn, Auke; Lievens, Caroline; Ryannugroho, Riskiray; Imaro, Tulus; Bruhn, David; van der Meer, Freek; Hutami, Rizki; Sibarani, Besteba; Sule, Rachmat; Saptadij, Nenny; Hecker, Christoph; Appelt, Oona; Wilke, Franziska

    2017-04-01

    Indonesia with its large, but partially unexplored geothermal potential is one of the most interesting and suitable places in the world to conduct geothermal exploration research. This study focuses on geothermal exploration based on fluid-rock geochemistry/geomechanics and aims to compile an overview on geochemical data-rock properties from important geothermal fields in Indonesia. The research carried out in the field and in the laboratory is performed in the framework of the GEOCAP cooperation (Geothermal Capacity Building program Indonesia- the Netherlands). The application of petrology and geochemistry accounts to a better understanding of areas where operating power plants exist but also helps in the initial exploration stage of green areas. Because of their relevance and geological setting geothermal fields in Java, Sulawesi and the sedimentary basin of central Sumatra have been chosen as focus areas of this study. Operators, universities and governmental agencies will benefit from this approach as it will be applied also to new green-field terrains. By comparing the characteristic of the fluids, the alteration petrology and the rock geochemistry we also aim to contribute to compile an overview of the geochemistry of the important geothermal fields in Indonesia. At the same time the rock petrology and fluid geochemistry will be used as input data to model the reservoir fluid composition along with T-P parameters with the geochemical workbench PHREEQC. The field and laboratory data are mandatory for both the implementation and validation of the model results.

  14. Geothermal Loan Guaranty Program and its impact on geothermal exploration and development

    Energy Technology Data Exchange (ETDEWEB)

    Nasr, L.H.

    1978-05-01

    The study showed that the Geothermal Loan Guaranty Program has had only a negligible effect on geothermal development and the response to the program was far less than expected. The streamlining of environmental regulations and leasing policies, and the granting of intangible drilling cost write-offs and depletion allowances to operators would have had a greater impact on geothermal energy development. The loan guaranty program did not promote the undertaking of any new projects that would not have been undertaken without it. The program only accelerated the pace for some development which might have commenced in the future. Included in the study are recommendations for improving the operation of the program thereby increasing its attractiveness to potential applicants.

  15. Play-fairway analysis for geothermal resources and exploration risk in the Modoc Plateau region

    Science.gov (United States)

    Siler, Drew; Zhang, Yingqi; Spycher, Nicolas F.; Dobson, Patrick; McClain, James S.; Gasperikova, Erika; Zierenberg, Robert A.; Schiffman, Peter; Ferguson, Colin; Fowler, Andrew; Cantwell, Carolyn

    2017-01-01

    The region surrounding the Modoc Plateau, encompassing parts of northeastern California, southern Oregon, and northwestern Nevada, lies at an intersection between two tectonic provinces; the Basin and Range province and the Cascade volcanic arc. Both of these provinces have substantial geothermal resource base and resource potential. Geothermal systems with evidence of magmatic heat, associated with Cascade arc magmatism, typify the western side of the region. Systems on the eastern side of the region appear to be fault controlled with heat derived from high crustal heat flow, both of which are typical of the Basin and Range. As it has the potential to host Cascade arc-type geothermal resources, Basin and Range-type geothermal resources, and/or resources with characteristics of both provinces, and because there is relatively little current development, the Modoc Plateau region represents an intriguing potential for undiscovered geothermal resources. It remains unclear however, what specific set(s) of characteristics are diagnostic of Modoc-type geothermal systems and how or if those characteristics are distinct from Basin and Range-type or Cascade arc-type geothermal systems. In order to evaluate the potential for undiscovered geothermal resources in the Modoc area, we integrate a wide variety of existing data in order to evaluate geothermal resource potential and exploration risk utilizing ‘play-fairway’ analysis. We consider that the requisite parameters for hydrothermal circulation are: 1) heat that is sufficient to drive circulation, and 2) permeability that is sufficient to allow for fluid circulation in the subsurface. We synthesize data that indicate the extent and distribution of these parameters throughout the Modoc region. ‘Fuzzy logic’ is used to incorporate expert opinion into the utility of each dataset as an indicator of either heat or permeability, and thus geothermal favorability. The results identify several geothermal prospects, areas that

  16. Applications of stable isotopes and radioisotopes in the exploration and reservoir management of Philippine geothermal fields

    International Nuclear Information System (INIS)

    Ferrer, H.P.; Alvis-Isidro, R.R.

    1996-01-01

    The development of indigenous geothermal energy resources is currently one of the primary thrusts of the country's energy program. Presently, the Philippines has a total of geothermal generating capacity of about 1400 MWe. This comprises about 20% of the total energy mix and electricity requirements of the country. By 1998, an additional capacity of about 500 MWe will be commissioned, and the PHilippines would be generating 1900 MWe of electricity from geothermal energy resources. From 1990 to 1993, PNOC EDC (Philippine National Oil Company, Energy Development Corporation) has been granted a research contract by the International Atomic Energy Agency (IAEA). The Company has also been a recipient since 1991 of an IAEA Technical Assistance on the use of stable isotope techniques in geothermal hydrology. Stable isotopes, particularly 18 O and 2 H, in conjunction with other geochemical parameters and geological and geophysical data, have been used to: a) establish the local meteoric water line; b) determine the origin of geothermal fluids; c) delineate the elevation of recharge of geothermal and ground water systems; d) confirm pre-exploitation hydrochemical models; e) identify physical and chemical processes due to exploitation of the geothermal resource (i.e. reinjection fluid returns, incursion of cold meteoric water, boiling due to pressure drawdown and mixing with acidic steam condensates); and, f) estimate reservoir temperatures. Techniques using radioisotopes, such as 14 C, have also been used for the age-dating of charred wood samples collected from some of our geothermal exploration areas. The detection of 3 H has also been used as an indicator for the incursion of recent cold meteoric water into the geothermal system. Tracer studies using 131 I, have also been previously carried out, in coordination with the Philippine Nuclear Research Institute, to determine local hydrology and flow paths of reinjected water in some of our geothermal fields

  17. Enhanced Geothermal Systems (EGS) well construction technology evaluation report.

    Energy Technology Data Exchange (ETDEWEB)

    Capuano, Louis, Jr. (Thermasource Inc.); Huh, Michael; Swanson, Robert (Thermasource Inc.); Raymond, David Wayne; Finger, John Travis; Mansure, Arthur James; Polsky, Yarom; Knudsen, Steven Dell

    2008-12-01

    Electricity production from geothermal resources is currently based on the exploitation of hydrothermal reservoirs. Hydrothermal reservoirs possess three ingredients critical to present day commercial extraction of subsurface heat: high temperature, in-situ fluid and high permeability. Relative to the total subsurface heat resource available, hydrothermal resources are geographically and quantitatively limited. A 2006 DOE sponsored study led by MIT entitled 'The Future of Geothermal Energy' estimates the thermal resource underlying the United States at depths between 3 km and 10 km to be on the order of 14 million EJ. For comparison purposes, total U.S. energy consumption in 2005 was 100 EJ. The overwhelming majority of this resource is present in geological formations which lack either in-situ fluid, permeability or both. Economical extraction of the heat in non-hydrothermal situations is termed Enhanced or Engineered Geothermal Systems (EGS). The technologies and processes required for EGS are currently in a developmental stage. Accessing the vast thermal resource between 3 km and 10 km in particular requires a significant extension of current hydrothermal practice, where wells rarely reach 3 km in depth. This report provides an assessment of well construction technology for EGS with two primary objectives: (1) Determining the ability of existing technologies to develop EGS wells. (2) Identifying critical well construction research lines and development technologies that are likely to enhance prospects for EGS viability and improve overall economics. Towards these ends, a methodology is followed in which a case study is developed to systematically and quantitatively evaluate EGS well construction technology needs. A baseline EGS well specification is first formulated. The steps, tasks and tools involved in the construction of this prospective baseline EGS well are then explicitly defined by a geothermal drilling contractor in terms of sequence, time and

  18. Geothermal technology development program. Annual progress report, October 1980-September 1981

    Energy Technology Data Exchange (ETDEWEB)

    Kelsey, J.R. (ed.)

    1982-09-01

    The status of ongoing Research and Development (R and D) within the Geothermal Technology Development Program is described. The program emphasizes research in rock penetration mechanics, fluid technology, borehole mechanics, and diagnostics technology.

  19. Geothermal exploration in the Virunga Prospect, Northern Rwanda

    Science.gov (United States)

    Jolie, E.

    2009-04-01

    German technical cooperation has taken the initiative to support partner countries in geothermal energy use. Therefore the Federal Institute for Geosciences and Natural Resources (BGR) on behalf of the Federal Ministry for Economic Cooperation and Development (BMZ) is carrying out the technical cooperation programme GEOTHERM. As an example of the ongoing project activities, preliminary results of studies carried out in the Virunga geothermal prospect in Northern Rwanda will be presented. The study area is located along the Western branch of the East African Rift System. Weak geothermal surface manifestations, e.g. hot springs and bubbling pools, indicate an existing hydrothermal system. Previous studies did not determine location, distribution, quality and quantity of the heat source. Consequently the aim of this study is to detect and assess the heat source with a multi method approach. Remote sensing techniques, geochemical analyses and geophysical measurements have been applied to make a first serious attempt. More detailed geophysical investigations and gas measurements are planned to start in spring 2009. Aerial photographs and satellite images were used for a high-resolution structural analysis to determine major fault zones, which are dominating the flow paths of hydrothermal fluids. In the frame of a regional geophysical survey (Magnetotellurics and Transient Electromagnetics) a zone of low resistivity values could be detected SW of the Karisimbi stratovolcano, which is corresponding with the results of the geochemical analyses. Assumptions are made that a magmatic body may exist in a depth of 5 km below surface.

  20. Tecuamburro Volcano, Guatemala: exploration geothermal gradient drilling and results

    Science.gov (United States)

    Goff, S.J.; Goff, F.; Janik, C.J.

    1992-01-01

    Results of geological, volcanological, hydrogeochemical, and geophysical field studies conducted in 1988 and 1989 at the Tecuamburro geothermal site, Guatemala, indicate that there is a substantial shallow heat source beneath the area of youngest volcanism. Gases from acid-sulfate springs near Laguna Ixpaco consistently yield maximum estimated subsurface temperatures of 300??C. To obtain information on subsurface temperatures and temperature gradients, stratigraphy, fracturing, hydrothermal alteration, and hydrothermal fluids, a geothermal gradient core hole (TCB-1) was drilled to 808 m low on the northern flank of the Tecuamburro Volcano complex. The hole is located 300 m south of a 300m-diameter phreatic crater. Laguna Ixpaco, dated at 2910 years. TCB-1 temperature logs do not indicate isothermal conditions at depth and the calculated thermal gradient from 500-800 m is 230??C/km. Bottom hole temperature is close to 240??C. Calculated heat flow values are around 350-400 mW/m2. Fluid-inclusion and secondary-alteration studies indicate that veins and secondary minerals were formed at temperatures equal to or slightly less than present temperatures; thus, the Tecuamburro geothermal system may still be heating up. The integration of results from the TCB-1 gradient core hole with results from field studies provides strong evidence that the Tecuamburro area holds great promise for geothermal resource development. ?? 1992.

  1. Behavior of Rare Earth Element In Geothermal Systems; A New Exploration/Exploitation Tool

    Energy Technology Data Exchange (ETDEWEB)

    Scott A. Wood

    2002-01-28

    The goal of this four-year project was to provide a database by which to judge the utility of the rare earth elements (REE) in the exploration for and exploitation of geothermal fields in the United States. Geothermal fluids from hot springs and wells have been sampled from a number of locations, including: (1) the North Island of New Zealand (1 set of samples); (2) the Cascades of Oregon; (3) the Harney, Alvord Desert and Owyhee geothermal areas of Oregon; (4) the Dixie Valley and Beowawe fields in Nevada; (5) Palinpion, the Philippines: (6) the Salton Sea and Heber geothermal fields of southern California; and (7) the Dieng field in Central Java, Indonesia. We have analyzed the samples from all fields for REE except the last two.

  2. Behavior of Rare Earth Element In Geothermal Systems; A New Exploration/Exploitation Tool; FINAL

    International Nuclear Information System (INIS)

    Scott A. Wood

    2002-01-01

    The goal of this four-year project was to provide a database by which to judge the utility of the rare earth elements (REE) in the exploration for and exploitation of geothermal fields in the United States. Geothermal fluids from hot springs and wells have been sampled from a number of locations, including: (1) the North Island of New Zealand (1 set of samples); (2) the Cascades of Oregon; (3) the Harney, Alvord Desert and Owyhee geothermal areas of Oregon; (4) the Dixie Valley and Beowawe fields in Nevada; (5) Palinpion, the Philippines: (6) the Salton Sea and Heber geothermal fields of southern California; and (7) the Dieng field in Central Java, Indonesia. We have analyzed the samples from all fields for REE except the last two

  3. Topographic map analysis to determine Arjuno-Welirang volcanostratigraphy and implication for geothermal exploration

    Science.gov (United States)

    Apriani, Lestari; Satriana, Joshua; Aulian Chalik, Citra; Syahputra Mulyana, Reza; Hafidz, Muhammad; Suryantini

    2017-12-01

    Volcanostratigraphy study is used for supporting geothermal exploration on preliminary survey. This study is important to identify volcanic eruption center which shows potential area of geothermal heat source. The purpose of volcanostratigraphy study in research area is going to distinguish the characteristics of volcanic eruption product that construct the volcanic body. The analysis of Arjuno-Welirang volcanostratigraphy identification are based on topographic maps of Malang sheet with 1:100.000 scale, 1:50.000 scale, and a geological map. Regarding to the delineation of ridge and river, we determine five crowns, three hummocks, one brigade and one super brigade. The crowns consist of Ringgit, Welirang, Arjuno, Kawi, and Penanggungan, the hummocks comprise of Kembar III, Kembar II, and Kembar I, the brigade is Arjuno-Welirang, and the super brigade is Tengger. Based on topographic map interpretation and geothermal prospect evaluation method analysis, shows that Arjuno-Welirang prospect area have good geothermal resource potential.

  4. Report (summarized) for fiscal 2000 on survey for demonstration of geothermal exploration technologies. Development of exploration method using reservoir bed fluctuation (Theme 4. Development of seismic wave exploration method); 2000 nendo chinetsu tansa gijutsu to kensho chosa hokokusho (yoyaku). Choryuso hendo tansaho kaihatsu - 4 (jishinha tansaho kaihatsu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    With an objective of developing a method effective to evaluate reservoir beds in the initial stage of development, to maintain output stability of power plants after having started the operation and to extract reservoirs existing in the vicinity of areas that have already been developed, research has been performed on a method to forecast spread of the reservoir beds and future variation, by identifying distribution of very small earthquakes generated by steam production activities, and change in three-dimensional velocity structure of elastic waves. This paper summarizes the achievements in fiscal 2000. In the research of the seismic wave variation monitoring technology, AE observation was performed during a long-term blowout test of geothermal survey wells in the Akinomiya area in Ak ita Prefecture, wherein it was verified that the reservoir bed fluctuation can be identified as the number of AE occurrence. In the research of the three dimensional seismic wave variation analysis, a three dimensional velocity structure analyzing program was used to analyze the status in the Kakkonda area. In the survey of elastic wave velocity structure, a survey was carried out in the Akinomiya area in Akita Prefecture by using the reflection method. As a result, sharp fall was verified in the western side of side tracks of basic rocks, which corresponds to the past survey result. A plurality of reflection events corresponding to depths of geothermal reservoir beds were detected successfully. (NEDO)

  5. Geothermal program review 16: Proceedings. A strategic plan for geothermal research

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-12-31

    The proceedings contain 21 papers arranged under the following topical sections: Exploration technology (4 papers); Reservoir technology (5 papers); Energy conversion technology (8 papers); Drilling technology (2 papers); and Direct use and geothermal heat pump technology (2 papers). An additional section contains a report on a workshop on dual-use technologies for hydrothermal and advanced geothermal reservoirs.

  6. The Momotombo Geothermal Field, Nicaragua: Exploration and development case history study

    Energy Technology Data Exchange (ETDEWEB)

    None

    1982-07-01

    This case history discusses the exploration methods used at the Momotombo Geothermal Field in western Nicaragua, and evaluates their contributions to the development of the geothermal field models. Subsequent reservoir engineering has not been synthesized or evaluated. A geothermal exploration program was started in Nicaragua in 1966 to discover and delineate potential geothermal reservoirs in western Nicaragua. Exploration began at the Momotombo field in 1970 using geological, geochemical, and geophysical methods. A regional study of thermal manifestations was undertaken and the area on the southern flank of Volcan Momotombo was chosen for more detailed investigation. Subsequent exploration by various consultants produced a number of geotechnical reports on the geology, geophysics, and geochemistry of the field as well as describing production well drilling. Geological investigations at Momotombo included photogeology, field mapping, binocular microscope examination of cuttings, and drillhole correlations. Among the geophysical techniques used to investigate the field sub-structure were: Schlumberger and electromagnetic soundings, dipole mapping and audio-magnetotelluric surveys, gravity and magnetic measurements, frequency domain soundings, self-potential surveys, and subsurface temperature determinations. The geochemical program analyzed the thermal fluids of the surface and in the wells. This report presents the description and results of exploration methods used during the investigative stages of the Momotombo Geothermal Field. A conceptual model of the geothermal field was drawn from the information available at each exploration phase. The exploration methods have been evaluated with respect to their contributions to the understanding of the field and their utilization in planning further development. Our principal finding is that data developed at each stage were not sufficiently integrated to guide further work at the field, causing inefficient use of

  7. Geophysical exploration of the Boku geothermal area, Central Ethiopian Rift

    Energy Technology Data Exchange (ETDEWEB)

    Abiye, Tamiru A. [School of Geosciences, Faculty of Science, University of the Witwatersrand, Private Bag X3, P.O. Box Wits, 2050 Johannesburg (South Africa); Tigistu Haile [Department of Geology and Geophysics, Addis Ababa University, P.O. Box 1176, Addis Ababa (Ethiopia)

    2008-12-15

    The Boku central volcano is located within the axial zone of the Central Ethiopian Rift near the town of Nazareth, Ethiopia. An integrated geophysical survey involving thermal, magnetic, electrical and gravimetric methods has been carried out over the Boku geothermal area in order to understand the circulation of fluids in the subsurface, and to localize the 'hot spot' providing heat to the downward migrating groundwaters before they return to the surface. The aim of the investigations was to reconstruct the geometry of the aquifers and the fluid flow paths in the Boku geothermal system, the country's least studied. Geological studies show that it taps heat from the shallow acidic Quaternary volcanic rocks of the Rift floor. The aquifer system is hosted in Quaternary Rift floor ignimbrites that are intensively fractured and receive regional meteoric water recharge from the adjacent escarpment and locally from precipitation and the Awash River. Geophysical surveys have mapped Quaternary faults that are the major geologic structures that allow the ascent of the hotter fluids towards the surface, as well as the cold-water recharge of the geothermal system. The shallow aquifers are mapped, preferred borehole sites for the extraction of thermal fluids are delineated and the depths to deeper thermal aquifers are estimated. (author)

  8. Environmental assessment for geothermal loan guarantee: South Brawley geothermal exploration project

    Energy Technology Data Exchange (ETDEWEB)

    1979-11-01

    The foregoing analysis indicates that the proposed geothermal field experiment could result in several adverse environmental effects. Such effects would lie primarily in the areas of air quality, noise, aesthetics, land use, and water consumption. However, for the most part, mitigating measures have been, or easily could be, included in project plans to reduce these adverse effects to insignificant levels. Those aspects of the project which are not completely amenable to mitigation by any reasonable means include air quality, noise, aesthetics, land use and water use.

  9. Geothermal studies in China

    International Nuclear Information System (INIS)

    Wang Ji-Yang; Chen Mo-Xiang; Wang Ji-An; Deng Xiao; Wang Jun; Shen Hsien-Chieh; Hsiung Liang-Ping; Yan Shu-Zhen; Fan Zhi-Cheng; Liu Xiu-Wen

    1981-01-01

    Geothermal studies have been conducted in China continuosly since the end of the 1950's with renewed activity since 1970. Three areas of research are defined: (1) fundamental theoretical research of geothermics, including subsurface temperatures, terrestrial heat flow and geothermal modeling; (2) exploration for geothermal resources and exploitation of geothermal energy; (3) geothermal studies in mines. (orig./ME)

  10. Geothermal Exploration of the Winston Graben, Central New Mexico, USA

    Science.gov (United States)

    Sophy, M. J.; Kelley, S. A.

    2011-12-01

    We are assessing the geothermal potential of the Winston Graben of central New Mexico using borehole temperature logs and geophysical data. The Winston Graben is a late Cenozoic rift basin, part of the larger Rio Grande rift, which is 5 to 10 km wide and 56 km long with northern and southern termini occurring at accommodation zones that coincide with late Cenozoic volcanic lineaments. The graben is interpreted to be symmetric based on geologic mapping, with 2 km of stratigraphic offset on both the western and eastern margins. The graben is bordered by the Black Range to the west and is separated from the Rio Grande valley by the Sierra Cuchillo, a horst block made of Paleozoic rocks intruded by a laccolith. Geothermal and geophysical data, including water table measurements, well temperature logs, thermal conductivity samples, bottom hole temperatures, water chemistry, and gravity data have been extracted from the New Mexico Geothermal Database, part of the National Geothermal Database, and the Geonet Gravity and Magnetic Dataset Repository. Combined with existing geologic maps of the Winston Graben and surroundings, these data help to identify spatial relationships between geologic structures and groundwater parameters and distribution. Geothermal gradients from industry temperature-depth well profiles range from 20°C/km to 60°C/km with a spatial distribution of higher gradients located on the eastern side of the Sierra Cuchillo horst, which is where a mapped warm spring is located. Lower thermal gradients were observed to the west in the groundwater recharge area of the basin. Analysis of Bouguer gravity data indicate a gravity low coinciding with the center of the Winston Graben, which is attributed to be the deepest part of the basin, symetrically surrounded by gravity highs. Gravity highs coincide with the middle Cenozoic Morenci and Chise volcanic lineaments along the northern and southern ends of the graben. The mapped warm spring occurs at the

  11. Exploration and development of the Cerro Prieto geothermal field

    Energy Technology Data Exchange (ETDEWEB)

    Lippmann, M.J.; Goldstein, N.E.; Halfman, S.E.; Witherspoon, P.A.

    1983-07-01

    A multidisciplinary effort to locate, delineate, and characterize the geothermal system at Cerro Prieto, Baja California, Mexico, began about 25 years ago. It led to the identification of an important high-temperature, liquid-dominated geothermal system which went into production in 1973. Initially, the effort was undertaken principally by the Mexican electric power agency, the Comision Federal de Electricidad (CFE). Starting in 1977 a group of US organizations sponsored by the US Department of Energy, joined CFE in this endeavor. An evaluation of the different studies carried out at Cerro Prieto has shown that: (1) surface electrical resistivity and seismic reflection surveys are useful in defining targets for exploratory drilling; (2) the mineralogical studies of cores and cuttings and the analysis of well logs are important in designing the completion of wells, identifying geological controls on fluid movement, determining thermal effects and inferring the thermal history of the field; (3) geochemical surveys help to define zones of recharge and paths of fluid migration; and (4) reservoir engineering studies are necessary in establishing the characteristics of the reservoir and in predicting its response to fluid production.

  12. Young (gold deposits and active geothermal systems of the Great Basin: Enigmas, questions, and exploration potential

    Science.gov (United States)

    Coolbaugh, Mark F.; Vikre, Peter G.; Faulds, James E.

    2011-01-01

    remobilized from older gold mineralization? Current research is investigating these and other questions to improve our genetic understanding of these young gold systems, which in turn can lead to improved exploration targeting. The recent rapid growth in resources for both young gold deposits and geothermal systems underscores their underdeveloped exploration potential. Even though many young gold deposits exhibit relatively shallow hot-springs-style mineralization, their young age may preclude exposure by erosion. Uplift along active normal faults has exposed some deposits (e.g., Florida Canyon, Dixie Comstock, Wind Mountain), but in other areas, such as the Walker Lane, where strike-slip faulting is prevalent, the opportunities for exposure can be limited. Many active geothermal systems are also concealed below the surface in that hot springs or steam vents may be absent above areas of thermal groundwater.With sources of energy to support mine production becoming more problematic, the potential advantages of simultaneously exploring for young gold deposits and spatially associated geothermal systems are becoming more apparent. Exploration methods recently proven effective in geothermal exploration that can be adapted to gold exploration include temperature surveys, hyperspectral remote sensing, geophysical surveys, water analyses, and detailed mapping of geothermal-related features and related fault systems.

  13. A History of Geothermal Energy Research and Development in the United States. Exploration 1976-2006

    Energy Technology Data Exchange (ETDEWEB)

    none,

    2010-09-01

    This report, the first in a four-part series, summarizes significant research projects performed by the U.S. Department of Energy (DOE) over 30 years to overcome challenges in exploration and to make generation of electricity from geothermal resources more cost-competitive.

  14. Geothermal technology publications and related reports: a bibliography, January 1984-December 1985

    Energy Technology Data Exchange (ETDEWEB)

    Cooper, D.L. (ed.)

    1986-09-01

    Technological limitations restrict the commercial availability of US geothermal resources and prevent effective evaluation of large resources, as magma, to meet future US needs. The US Department of Energy has asked Sandia to serve as the lead laboratory for research in Geothermal Technologies and Magma Energy Extraction. In addition, technology development and field support has been provided to the US Continental Scientific Drilling Program. Published results for this work from January 1984 through December 1985 are listed in this bibliography.

  15. Geothermal drilling and completion technology development program. Quarterly progress report, January-March 1980

    Energy Technology Data Exchange (ETDEWEB)

    Varnado, S.G. (ed.)

    1980-04-01

    The progress, status, and results of ongoing Research and Development (R and D) within the Geothermal Drilling and Completion Technology Development Program are described. The program emphasizes the development of geothermal drilling hardware, drilling fluids, completion technology, and lost circulation control methods. Advanced drilling systems are also under development. The goals of the program are to develop the technology required to reduce well costs by 25% by 1983 and by 50% by 1987.

  16. Geothermal drilling and completion technology development program. Annual progress report, October 1979-September 1980

    Energy Technology Data Exchange (ETDEWEB)

    Varnado, S.G. (ed.)

    1980-11-01

    The progress, status, and results of ongoing research and development (R and D) within the Geothermal Drilling and Completion Technology Development Program are described. The program emphasizes the development of geothermal drilling hardware, drilling fluids, completion technology, and lost circulation control methods. Advanced drilling systems are also under development. The goals of the program are to develop the technology required to reduce well costs by 25% by 1983 and by 50% by 1987.

  17. Geophysical exploration at Takigami geothermal field in Oita Prefecture, Japan

    Energy Technology Data Exchange (ETDEWEB)

    Aoki, M. (Idemitsu Geothermal Co., Ltd., Tokyo (Japan))

    1988-11-10

    Remote sensing study, gravity and magneto-telluric (MT) surveys in Takigami geothermal field were carried out. A great number of E-W lineaments are easily recognized with LANDSAT and so on. These E-W lineaments might be distinguished into two groups. One group might be considered to be made simply related to N-S tensional stress, the other has circular feature enclosing mountainous body. The center part of the volcano seems to be depressed relatively. These lineaments are thought to be associated with the volcanic activity which created these volcanos, in addition to the regional tensional stress. The gravitational slope is steep and inclines to the west (-35m gal minimum), the easternmost part is almost on the gravitational high. Takigami area is positioned on the gravitational slope, probably related to the large-scale tectonic depression. There are many geothermal active manifestations. The correlation between MT data and real logging data was excellent beyond expectation. In Takigami area, surface layer is resistive and shows 30-500{Omega}-m. Intermediate layer is extremely conductive one with 1-10{Omega}-m. Bottom layer is relatively resistive and is within 30-500{Omega}-m. Intermediate layer is shallow and thin in the eastern part. On the other hand, this layer is deep and thick in the western part. This shape of structure is a common feature with gravitational structure. According to the X-ray diffraction study of hydrothermal alteration, surface layer is unaltered, but intermediate and bottom layer suffer hydrothermal alteration.

  18. Geothermal energy. A national proposal for geothermal resources research

    Energy Technology Data Exchange (ETDEWEB)

    Denton, J.C. (ed.)

    1972-01-01

    Discussions are given for each of the following topics: (1) importance to the Nation of geothermal resources, (2) budget recommendations, (3) overview of geothermal resources, (4) resource exploration, (5) resource assessment, (6) resource development and production, (7) utilization technology and economics, (8) environmental effects, (9) institutional considerations, and (10) summary of research needs.

  19. Benchmark Problems of the Geothermal Technologies Office Code Comparison Study

    Energy Technology Data Exchange (ETDEWEB)

    White, Mark D. [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Podgorney, Robert [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Kelkar, Sharad M. [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); McClure, Mark W. [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Danko, George [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Ghassemi, Ahmad [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Fu, Pengcheng [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Bahrami, Davood [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Barbier, Charlotte [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Cheng, Qinglu [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Chiu, Kit-Kwan [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Detournay, Christine [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Elsworth, Derek [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Fang, Yi [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Furtney, Jason K. [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Gan, Quan [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Gao, Qian [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Guo, Bin [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Hao, Yue [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Horne, Roland N. [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Huang, Kai [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Im, Kyungjae [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Norbeck, Jack [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Rutqvist, Jonny [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Safari, M. R. [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Sesetty, Varahanaresh [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Sonnenthal, Eric [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Tao, Qingfeng [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); White, Signe K. [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Wong, Yang [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Xia, Yidong [Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

    2016-12-02

    A diverse suite of numerical simulators is currently being applied to predict or understand the performance of enhanced geothermal systems (EGS). To build confidence and identify critical development needs for these analytical tools, the United States Department of Energy, Geothermal Technologies Office has sponsored a Code Comparison Study (GTO-CCS), with participants from universities, industry, and national laboratories. A principal objective for the study was to create a community forum for improvement and verification of numerical simulators for EGS modeling. Teams participating in the study were those representing U.S. national laboratories, universities, and industries, and each team brought unique numerical simulation capabilities to bear on the problems. Two classes of problems were developed during the study, benchmark problems and challenge problems. The benchmark problems were structured to test the ability of the collection of numerical simulators to solve various combinations of coupled thermal, hydrologic, geomechanical, and geochemical processes. This class of problems was strictly defined in terms of properties, driving forces, initial conditions, and boundary conditions. Study participants submitted solutions to problems for which their simulation tools were deemed capable or nearly capable. Some participating codes were originally developed for EGS applications whereas some others were designed for different applications but can simulate processes similar to those in EGS. Solution submissions from both were encouraged. In some cases, participants made small incremental changes to their numerical simulation codes to address specific elements of the problem, and in other cases participants submitted solutions with existing simulation tools, acknowledging the limitations of the code. The challenge problems were based on the enhanced geothermal systems research conducted at Fenton Hill, near Los Alamos, New Mexico, between 1974 and 1995. The problems

  20. Present status of exploration and development of the geothermal resources of Guatemala

    International Nuclear Information System (INIS)

    Caicedo, A.; Palma, J.

    1990-01-01

    This paper reports on the study of geothermal exploration and geothermal development in the nation of Guatemala that is being led by the Instituto Nacionai de electrificacion (INDE) through the Unidad de Desarrollo Geotermico (UDG), for the purpose of developing the geothermal resources in order to generate electricity. Since 1972, it has accomplished geoscientific studies with regional surveys in 13 areas located in the volcanic region in the southern part of the country. Also, prefeasibility studies have been carried out in geothermal areas such as Moyuta and Tecuamburro in the southeast of the country; Amatitlan in the central region and San Marcos in the west. Moreover, in the geothermal field of Zunil I, which is located in the western Department of Quetzaltenango, the feasibility study has been completed, and the first geothermo-electric plant of 15 MW is being schedule for June of 1993. By then, the feasibility study for the second power plant in the more promising area of Zunil II located on the outskirts of Zunil I or Amatitlan. Also, in the area of Zunil I a farm-produce dehydration plant has been built through a technical cooperation agreement between INDE and Los Alamos National Laboratory, LANL. It has the purpose of showing the use of direct-heat through produced steam from the slim hole Z-11

  1. National forecast for geothermal resource exploration and development with techniques for policy analysis and resource assessment

    Energy Technology Data Exchange (ETDEWEB)

    Cassel, T.A.V.; Shimamoto, G.T.; Amundsen, C.B.; Blair, P.D.; Finan, W.F.; Smith, M.R.; Edeistein, R.H.

    1982-03-31

    The backgrund, structure and use of modern forecasting methods for estimating the future development of geothermal energy in the United States are documented. The forecasting instrument may be divided into two sequential submodels. The first predicts the timing and quality of future geothermal resource discoveries from an underlying resource base. This resource base represents an expansion of the widely-publicized USGS Circular 790. The second submodel forecasts the rate and extent of utilization of geothermal resource discoveries. It is based on the joint investment behavior of resource developers and potential users as statistically determined from extensive industry interviews. It is concluded that geothermal resource development, especially for electric power development, will play an increasingly significant role in meeting US energy demands over the next 2 decades. Depending on the extent of R and D achievements in related areas of geosciences and technology, expected geothermal power development will reach between 7700 and 17300 Mwe by the year 2000. This represents between 8 and 18% of the expected electric energy demand (GWh) in western and northwestern states.

  2. The Gabbs Valley, Nevada, geothermal prospect: Exploring for a potential blind geothermal resource

    Science.gov (United States)

    Payne, J.; Bell, J. W.; Calvin, W. M.

    2012-12-01

    The Gabbs Valley prospect in west-central Nevada is a potential blind geothermal resource system. Possible structural controls on this system were investigated using high-resolution LiDAR, low sun-angle aerial (LSA) photography, exploratory fault trenching and a shallow temperature survey. Active Holocene faults have previously been identified at 37 geothermal systems with indication of temperatures greater than 100° C in the western Nevada region. Active fault controls in Gabbs Valley include both Holocene and historical structures. Two historical earthquakes occurring in 1932 and 1954 have overlapping surface rupture patterns in Gabbs Valley. Three active fault systems identified through LSA and LiDAR mapping have characteristics of Basin and Range normal faulting and Walker Lane oblique dextral faulting. The East Monte Cristo Mountains fault zone is an 8.5 km long continuous NNE striking, discrete fault with roughly 0.5 m right-normal historic motion and 3 m vertical Quaternary separation. The Phillips Wash fault zone is an 8.2 km long distributed fault system striking NE to N, with Quaternary fault scarps of 1-3 m vertical separation and a 500 m wide graben adjacent to the Cobble Cuesta anticline. This fault displays ponded drainages, an offset terrace riser and right stepping en echelon fault patterns suggestive of left lateral offset, and fault trenching exposed non-matching stratigraphy typical of a significant component of lateral offset. The unnamed faults of Gabbs Valley are a 10.6 km long system of normal faults striking NNE and Quaternary scarps are up to 4 m high. These normal faults largely do not have historic surface rupture, but a small segment of 1932 rupture has been identified. A shallow (2 m deep) temperature survey of 80 points covering roughly 65 square kilometers was completed. Data were collected over approximately 2 months, and continual base station temperature measurements were used to seasonally correct temperature measurements. A 2

  3. Geothermal energy

    International Nuclear Information System (INIS)

    Anon.

    1992-01-01

    This chapter discusses the role of geothermal energy may have on the energy future of the US. The topics discussed in the chapter include historical aspects of geothermal energy, the geothermal resource, hydrothermal fluids, electricity production, district heating, process heating, geopressured brines, technology and costs, hot dry rock, magma, and environmental and siting issues

  4. Lithosphere tectonics and thermo-mechanical properties: An integrated modeling approach for enhanced geothermal systems exploration in Europe

    NARCIS (Netherlands)

    Wees, J.D. van; Cloetingh, S.; Ziegler, P.A.; Lenkey, L.; Beekman, F.; Tesauro, M.; Förster, A.; Norden, B.; Kaban, M.; Hardebol, N.; Voorde, M.T.; Willingshofer, E.; Cornu, T.; Bonté, D.

    2009-01-01

    For geothermal exploration and the development of enhanced geothermal systems (EGS) knowlegde of temperature at drillable depth is a prerequisite for site selection. Equally important is the thermo-mechanical signature of the lithosphere and crust which allow to obtain critical constraints for the

  5. DARPA Workshop on Geothermal Energy for Military Operations

    Science.gov (United States)

    2010-05-01

    is administered by its Geothermal Program Office (GPO) at the Navy Air Weapons Station, China Lake, CA. GPO manages the Coso Geo- thermal Field at...advanced geothermal technologies might reduce the risk and cost to the point where the U.S. military would be able to take advantage. Supplying geothermal...was con- vened to explore whether investment in advanced geothermal technologies might reduce the risk and cost to the point where the U.S. military

  6. Exploration of Geothermal Natural Resources from Menengai Caldera at Naruku, Kenya

    Science.gov (United States)

    Patlan, E.; Wamalwa, A.; Thompson, L. E.; Kaip, G.; Velasco, A. A.

    2011-12-01

    The Menengai Caldera, a large, dormant volcano, lies near the city of Naruku, Kenya (0.20°S, 36.07°E) and presents a significant natural geothermal energy resource that will benefit local communities. Kenya continues to explore and exploit its only major energy resource: geothermal energy. The Geothermal Development Company (GDC) of Kenya and University of Texas at El Paso (UTEP) have initially deployed seven seismic stations to address the volcanic hazards and associated processes that occurs through the analysis of data collection from seismic sensors that record ground motion. Seven more sensors are planned to be deployed in Aug. 2011. In general, the internal state and activity of the caldera is an important component to the understanding of porosity of the fault system, which is derived from the magma movement of the hot spot, and for the exploitation of geothermal energy. We analyze data from March to May 2011 to investigate the role of earthquakes and faults in controlling the caldera processes, and we find 15 events occurred within the caldera. We will utilize the double difference earthquake location algorithm (HypoDD) to analyze the local events in order to find active faulting of the caldera and the possible location of the magma chamber. For future work, we will combine the exiting data with the new seismic station to image the location of the caldera magma chamber.

  7. Federal Geothermal Research Program Update Fiscal Year 2004

    Energy Technology Data Exchange (ETDEWEB)

    2005-03-01

    The Department of Energy (DOE) and its predecessors have conducted research and development (R&D) in geothermal energy since 1971. The Geothermal Technologies Program (GTP) works in partnership with industry to establish geothermal energy as an economically competitive contributor to the U.S. energy supply. Geothermal energy production, a $1.5 billion a year industry, generates electricity or provides heat for direct use applications. The technologies developed by the Geothermal Technologies Program will provide the Nation with new sources of electricity that are highly reliable and cost competitive and do not add to America's air pollution or the emission of greenhouse gases. Geothermal electricity generation is not subject to fuel price volatility and supply disruptions from changes in global energy markets. Geothermal energy systems use a domestic and renewable source of energy. The Geothermal Technologies Program develops innovative technologies to find, access, and use the Nation's geothermal resources. These efforts include emphasis on Enhanced Geothermal Systems (EGS) with continued R&D on geophysical and geochemical exploration technologies, improved drilling systems, and more efficient heat exchangers and condensers. The Geothermal Technologies Program is balanced between short-term goals of greater interest to industry, and long-term goals of importance to national energy interests. The program's research and development activities are expected to increase the number of new domestic geothermal fields, increase the success rate of geothermal well drilling, and reduce the costs of constructing and operating geothermal power plants. These improvements will increase the quantity of economically viable geothermal resources, leading in turn to an increased number of geothermal power facilities serving more energy demand. These new geothermal projects will take advantage of geothermal resources in locations where development is not currently

  8. Federal Geothermal Research Program Update - Fiscal Year 2004

    Energy Technology Data Exchange (ETDEWEB)

    Patrick Laney

    2005-03-01

    The Department of Energy (DOE) and its predecessors have conducted research and development (R&D) in geothermal energy since 1971. The Geothermal Technologies Program (GTP) works in partnership with industry to establish geothermal energy as an economically competitive contributor to the U.S. energy supply. Geothermal energy production, a $1.5 billion a year industry, generates electricity or provides heat for direct use applications. The technologies developed by the Geothermal Technologies Program will provide the Nation with new sources of electricity that are highly reliable and cost competitive and do not add to America's air pollution or the emission of greenhouse gases. Geothermal electricity generation is not subject to fuel price volatility and supply disruptions from changes in global energy markets. Geothermal energy systems use a domestic and renewable source of energy. The Geothermal Technologies Program develops innovative technologies to find, access, and use the Nation's geothermal resources. These efforts include emphasis on Enhanced Geothermal Systems (EGS) with continued R&D on geophysical and geochemical exploration technologies, improved drilling systems, and more efficient heat exchangers and condensers. The Geothermal Technologies Program is balanced between short-term goals of greater interest to industry, and long-term goals of importance to national energy interests. The program's research and development activities are expected to increase the number of new domestic geothermal fields, increase the success rate of geothermal well drilling, and reduce the costs of constructing and operating geothermal power plants. These improvements will increase the quantity of economically viable geothermal resources, leading in turn to an increased number of geothermal power facilities serving more energy demand. These new geothermal projects will take advantage of geothermal resources in locations where development is not currently possible or

  9. Geoplat-Spanish Geothermal technology platform-; Geoplat-Plataforma Tecnologica Espanola de Geotermia-

    Energy Technology Data Exchange (ETDEWEB)

    Gregorio, M. de

    2009-07-01

    It was recently created the Spanish Geothermal Technology Platform-GEOPLAT- to provide a framework within, all sectors involved in the development of geothermal energy, leading the industry, work together in a coordinated way to ensure the commercial settlement of this renewable energy and its continuous growth, in a competitive and sustainable form. Its main objectives and structure are briefly described in the paper. (Author)

  10. IN SITU GEOTHERMAL ENERGY TECHNOLOGY: AN APPROACH FOR BUILDING CLEANER AND GREENER ENVIRONMENT

    Directory of Open Access Journals (Sweden)

    Md. Faruque Hossain

    2016-01-01

    Full Text Available Geothermal energy is abundant everywhere in the world. It certainly would be a great benefit for human being once it is produced by a sophisticated technology. Consequently, it would be the biggest console for earth considering environmental sustainability. Unfortunately, the current status of commercial production of geothermal energy primarily from hydrothermal, geopressured, hot dry rock, and magma are limited to a few countries due to technological difficulties and production cost. This paper describes a simple technology where an in situ geothermal plant assisted by a heat pump would act as a high-temperature production (>150°C to provide excellent capacity of energy generation. The issue related to costs is interestingly cheaper on production, comparing to other technologies, such as solar, hydro, wind, and traditional geothermal technology as described in this article. Therefore, it is suggested that heat pump assisted in situ geothermal energy sources has a great potentiality to be a prime energy source in near future. Since the technology has a number of positive characteristics (simple, safe, and provides continuous baseload, load following, or peaking capacity and benign environmental attributes (zero emissions of CO2, SOx, and NOx, it certainly would be an interesting technology in both developed, and developing countries as an attractive option to produce clean energy to confirm a better environment.

  11. Geothermal tomorrow 2008

    Energy Technology Data Exchange (ETDEWEB)

    None, None

    2009-01-18

    Contributors from the Geothermal Technologies Program and the geothermal community highlight the current status and activities of the Program and the development of the global resource of geothermal energy.

  12. Community Geothermal Technology Program: Fruit drying with geothermal energy. Final report

    Energy Technology Data Exchange (ETDEWEB)

    1988-03-14

    Largest problem was lack of proper recording and controlling instrumentation. Agricultural products tested were green papaya powder, banana slices, and pineapple slices. Results show that a temperature of 120 F is a good drying temperature. Papaya should be mature green and not overly ripe; banana ripeness is also important; and pineapple slice thickness should be very uniform for even drying. Geothermal drying is feasible. Figs, tabs.

  13. A case study of radial jetting technology for enhancing geothermal energy systems at Klaipeda geothermal demonstration plant

    NARCIS (Netherlands)

    Nair, R.; Peters, E.; Sliaupa, S.; Valickas, R.; Petrauskas, S.

    2017-01-01

    In 1996 a geothermal energy project was initiated at Klaipėda, Lithuania, to demonstrate the feasibility of using low enthalpy geothermal water as a renewable energy resource in district heating systems. The Klaipėda geothermal plant is situated within the West Lithuanian geothermal anomaly with a

  14. Exploration Medical Capability - Technology Watch

    Science.gov (United States)

    Krihak, Michael; Watkins, Sharmila; Barr, Yael; Barsten, Kristina; Fung, Paul; Baumann, David

    2011-01-01

    The objectives of the Technology Watch process are to identify emerging, high-impact technologies that augment current ExMC development efforts, and to work with academia, industry, and other government agencies to accelerate the development of medical care and research capabilities for the mitigation of potential health issues that could occur during space exploration missions. The establishment of collaborations with these entities is beneficial to technology development, assessment and/or insertion. Such collaborations also further NASA s goal to provide a safe and healthy environment for human exploration. The Tech Watch project addresses requirements and capabilities identified by knowledge and technology gaps that are derived from a discrete set of medical conditions that are most likely to occur on exploration missions. These gaps are addressed through technology readiness level assessments, market surveys, collaborations and distributed innovation opportunities. Ultimately, these gaps need to be closed with respect to exploration missions, and may be achieved through technology development projects. Information management is a key aspect to this process where Tech Watch related meetings, research articles, collaborations and partnerships are tracked by the HRP s Exploration Medical Capabilities (ExMC) Element. In 2011, ExMC will be introducing the Tech Watch external website and evidence wiki that will provide access to ExMC technology and knowledge gaps, technology needs and requirements documents.

  15. FY 2000 report on the verification survey of geothermal exploration technology, etc. Summary. Development of the exploration method of reservoir changes (Theme 3 - Development of the electrical/electromagnetic prospecting method); 2000 nendo chinetsu tansa gijutsu tou kensho chosa hokokusho (Yoyaku). Choryusou hendou tansaho kaihatsu (Tema 3 - Denki denjiki tansa ho kaihatsu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    For the purpose of developing the technology for accurately predicting the spread of reservoir and future changes by grasping changes in self- potential and resistivity caused by sampling/reduction of geothermal fluids, an investigational study was conducted, and the FY 2000 results were summarized. As to the development of the self- potential monitoring system, observation was continuously made at 50 points on the earth's surface and 3 measuring points of bottom hole, and changes in self-potential associated with the production/reduction in the Ogiri power plant were smoothly observed. Concerning the development of the resistivity monitoring system, in the preliminary test made in the previous fiscal year, effectiveness was recognized of the high accuracy MT method monitoring system that can detect resistivity changes caused by reservoir changes, and the monitoring was started in this fiscal year. As to the development of the method for predicting reservoir changes using self-potential/resistivity, STAR-TOUGH 2 and self-potential post processor were applied to the geothermal simulation model in the Ogiri area, and study of the applicability and improvement of reservoir models were made. (NEDO)

  16. Geothermal Energy Research and Development Program; Project Summaries

    Energy Technology Data Exchange (ETDEWEB)

    None

    1994-03-01

    This is an internal DOE Geothermal Program document. This document contains summaries of projects related to exploration technology, reservoir technology, drilling technology, conversion technology, materials, biochemical processes, and direct heat applications. [DJE-2005

  17. Fracture properties from tight reservoir outcrop analogues with application to geothermal exploration

    Science.gov (United States)

    Philipp, Sonja L.; Reyer, Dorothea; Afsar, Filiz; Bauer, Johanna F.; Meier, Silke; Reinecker, John

    2015-04-01

    In geothermal reservoirs, similar to other tight reservoirs, fluid flow may be intensely affected by fracture systems, in particular those associated with fault zones. When active (slipping) the fault core, that is, the inner part of a fault zone, which commonly consists of breccia or gouge, can suddenly develop high permeability. Fault cores of inactive fault zones, however, may have low permeabilities and even act as flow barriers. In the outer part of a fault zone, the damage zone, permeability depends mainly on the fracture properties, that is, the geometry (orientation, aperture, density, connectivity, etc.) of the fault-associated fracture system. Mineral vein networks in damage zones of deeply eroded fault zones in palaeogeothermal fields demonstrate their permeability. In geothermal exploration, particularly for hydrothermal reservoirs, the orientation of fault zones in relation to the current stress field as well as their internal structure, in particular the properties of the associated fracture system, must be known as accurately as possible for wellpath planning and reservoir engineering. Here we present results of detailed field studies and numerical models of fault zones and associated fracture systems in palaeogeo¬thermal fields and host rocks for geothermal reservoirs from various stratigraphies, lithologies and tectonic settings: (1) 74 fault zones in three coastal sections of Upper Triassic and Lower Jurassic age (mudstones and limestone-marl alternations) in the Bristol Channel Basin, UK. (2) 58 fault zones in 22 outcrops from Upper Carboniferous to Upper Cretaceous in the Northwest German Basin (siliciclastic, carbonate and volcanic rocks); and (3) 16 fault zones in 9 outcrops in Lower Permian to Middle Triassic (mainly sandstone and limestone) in the Upper Rhine Graben shoulders. Whereas (1) represent palaeogeothermal fields with mineral veins, (2) and (3) are outcrop analogues of reservoir horizons from geothermal exploration. In the study

  18. Reducing Subjectivity in Geothermal Exploration Decision Making (Presentation); NREL(National Renewable Energy Laboratory)

    Energy Technology Data Exchange (ETDEWEB)

    Akar, S.; Young, K.

    2015-01-01

    Geothermal exploration projects have a significant amount of risk associated with uncertainties encountered in the discovery of the geothermal resource. Two of the largest challenges for increased geothermal deployment are 1) understanding when and how to proceed in an exploration program, and 2) when to walk away from a site. Current methodologies for exploration decision-making are formulatedby subjective expert opinion which can be incorrectly biased by expertise (e.g. geochemistry, geophysics), geographic location of focus, and the assumed conceptual model. The aim of this project is to develop a methodology for more objective geothermal exploration decision making at a given location, including go/no-go decision points to help developers and investors decide when to give up on alocation. In this scope, two different approaches are investigated: 1) value of information analysis (VOIA) which is used for evaluating and quantifying the value of a data before they are purchased, and 2) enthalpy-based exploration targeting based on reservoir size, temperature gradient estimates, and internal rate of return (IRR). The first approach, VOIA, aims to identify the value of aparticular data when making decisions with an uncertain outcome. This approach targets the pre-drilling phase of exploration. These estimated VOIs are highly affected by the size of the project and still have a high degree of subjectivity in assignment of probabilities. The second approach, exploration targeting, is focused on decision making during the drilling phase. It starts with a basicgeothermal project definition that includes target and minimum required production capacity and initial budgeting for exploration phases. Then, it uses average temperature gradient, reservoir temperature estimates, and production capacity to define targets and go/no-go limits. The decision analysis in this approach is based on achieving a minimum IRR at each phase of the project. This secondapproach was determined

  19. Geothermal power development in Hawaii. Volume I. Review and analysis

    Energy Technology Data Exchange (ETDEWEB)

    1982-06-01

    The history of geothermal exploration in Hawaii is reviewed briefly. The nature and occurrences of geothermal resources are presented island by island. An overview of geothermal markets is presented. Other topies covered are: potential markets of the identified geothermal areas, well drilling technology, hydrothermal fluid transport, overland and submarine electrical transmission, community aspects of geothermal development, legal and policy issues associated with mineral and land ownership, logistics and infrastructure, legislation and permitting, land use controls, Regulation 8, Public Utilities Commission, political climate and environment, state plans, county plans, geothermal development risks, and business planning guidelines.

  20. Community Geothermal Technology Program: Experimental lumber drying kiln. Final report

    Energy Technology Data Exchange (ETDEWEB)

    Leaman, D.; Irwin, B.

    1989-10-01

    Goals were to demonstrate feasibility of using the geothermal waste effluent from the HGP-A well as a heat source for a kiln operation to dry hardwoods, develop drying schedules, and develop automatic systems to monitor/control the geothermally heated lumber dry kiln systems. The feasibility was demonstrated. Lumber was dried in periods of 2 to 6 weeks in the kiln, compared to 18 months air drying and 6--8 weeks using a dehumidified chamber. Larger, plate-type heat exchangers between the primary fluid and water circulation systems may enable the kiln to reach the planned temperatures (180--185 F). However, the King Koa partnership cannot any longer pursue the concept of geothermal lumber kilns.

  1. Geothermal energy technology: issues, R and D needs, and cooperative arrangements

    Energy Technology Data Exchange (ETDEWEB)

    1987-01-01

    In 1986, the National Research Council, through its Energy Engineering Board, formed the Committee on Geothermal Energy Technology. The committee's study addressed major issues in geothermal energy technology, made recommendations for research and development, and considered cooperative arrangements among government, industry, and universities to facilitate RandD under current severe budget constraints. The report addresses four types of geothermal energy: hydrothermal, geopressured, hot dry rock, and magma systems. Hydrothermal systems are the only type that are now economically competitive commercially. Further technology development by the Department of Energy could make the uneconomical hydrothermal resources commercially attractive to the industry. The economics are more uncertain for the longer-term technologies for extracting energy from geopressured, hot dry rock, and magma systems. For some sites, the cost of energy derived from geopressured and hot dry rock systems is projected within a commercially competitive range. The use of magma energy is too far in the future to make reasonable economic calculations.

  2. ThermoGIS: An integrated web-based information system for geothermal exploration and governmental decision support for mature oil and gas basins

    NARCIS (Netherlands)

    Wees, J.-D. van; Juez-Larre, J.; Mijnlieff, H.; Kronimus, A.; Gessel, S. van; Kramers, L.; Obdam, A.; Verweij, H.; Bonté, D.

    2009-01-01

    In the recent years the use of geothermal energy through implementation of low enthalpy geothermal production systems for both electricity and heating have been growing rapidly in north-western Europe. Geothermal exploration and production takes largely place in sedimentary basins at depths from 2

  3. The Potential of Geothermal as a Major Supplier of U.S. Primary Energy using EGS technology

    Science.gov (United States)

    Tester, J. W.

    2012-12-01

    Recent national focus on the value of increasing our supply of indigenous, renewable energy underscores the need for re-evaluating all alternatives, particularly those that are large and well-distributed nationally. To transition from our current hydrocarbon-based energy system, we will need to expand and diversify the portfolio of options we currently have. One such option that has been undervalued and often ignored completely in national assessments is geothermal energy from both conventional hydrothermal resources and enhanced or engineered geothermal systems (EGS). Although geothermal energy is currently used for both electric and non-electric applications worldwide from conventional hydrothermal resources and in groundsource heat pumps, most of the emphasis in the US has been generating electricity. For example, a 2006 MIT-led study focused on the potential for EGS to provide 100,000 MWe of base-load electric generating capacity in the US by 2050. Since that time, a Cornell-led study has evaluated the potential for geothermal to meet the more than 25 EJ per year demand in the US for low temperature thermal energy for heating and other direct process applications Field testing of EGS in the US, Europe, and Australia is reviewed to outline what remains to be done for large-scale deployment. Research, Development and Demonstration (RD&D) needs in five areas important to geothermal deployment on a national scale will be reviewed: 1. Resource - estimating the magnitude and distribution of the US resource 2. Reservoir Technology - establishing requirements for extracting and utilizing energy from EGS reservoirs including drilling, reservoir design and stimulation 3. Utilization - exploring end use options for district heating, electricity generation and co-generation. 4. Environmental impacts and tradeoffs -- dealing with water and land use and seismic risk and quantifying the reduction in carbon emissions with increased deployment 5. Economics - projecting costs

  4. Geochemical exploration of a promissory Enhanced Geothermal System (EGS): the Acoculco caldera, Mexico.

    Science.gov (United States)

    Peiffer, Loic; Romero, Ruben Bernard; Pérez-Zarate, Daniel; Guevara, Mirna; Santoyo Gutiérrez, Edgar

    2014-05-01

    The Acoculco caldera (Puebla, Mexico) has been identified by the Mexican Federal Electricity Company (in Spanish 'Comisión Federal de Electricidad', CFE) as a potential Enhanced Geothermal System (EGS) candidate. Two exploration wells were drilled and promising temperatures of ~300° C have been measured at a depth of 2000 m with a geothermal gradient of 11oC/100m, which is three times higher than the baseline gradient measured within the Trans-Mexican Volcanic Belt. As usually observed in Hot Dry Rock systems, thermal manifestations in surface are scarce and consist in low-temperature bubbling springs and soil degassing. The goals of this study were to identify the origin of these fluids, to estimate the soil degassing rate and to explore new areas for a future detailed exploration and drilling activities. Water and gas samples were collected for chemical and isotopic analysis (δ18O, δD, 3He/4He, 13C, 15N) and a multi-gas (CO2, CH4, H2S) soil survey was carried out using the accumulation chamber method. Springs' compositions indicate a meteoric origin and the dissolution of CO2 and H2S-rich gases, while gas compositions reveal a MORB-type origin mixed with some arc-type contribution. Gas geothermometry results are similar to temperatures measured during well drilling (260° C-300° C). Amongst all measured CO2 fluxes, only 5% (mean: 5543 g m-2 day-1) show typical geothermal values, while the remaining fluxes are low and correspond to biogenic degassing (mean: 18 g m-2 day-1). The low degassing rate of the geothermal system is a consequence of the intense hydrothermal alteration observed in the upper 800 m of the system which acts as an impermeable caprock. Highest measured CO2 fluxes (above > 600 g m-2 day-1) have corresponding CH4/CO2 flux ratios similar to mass ratios of sampled gases, which suggest an advective fluid transport. To represent field conditions, a numerical model was also applied to simulate the migration of CO2 towards the surface through a

  5. Community Geothermal Technology Program: Silica bronze project. Final report

    Energy Technology Data Exchange (ETDEWEB)

    Bianchini, H.

    1989-10-01

    Objective was to incorporate waste silica from the HGP-A geothermal well in Pohoiki with other refractory materials for investment casting of bronze sculpture. The best composition for casting is about 50% silica, 25% red cinders, and 25% brick dust; remaining ingredient is a binder, such as plaster and water.

  6. Fiscal 1999 research and verification of geothermal energy exploring technologies and the like. Development of reservoir change prediction technology (Development of modelling support technology); 1999 nendo chinetsu tansa gijutsu nado kensho chosa hokokusho (yoyaku). Choryuso hendo tansaho kaihatsu (choryuso hendo yosoku gijutsu (modeling shien gijutsu))

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    The aim is to develop and popularize techniques relating to geological information such as thermal history. The efforts center about the application of a now-available core fracture measuring system to developed geothermal fields and about the development of new technologies. The measuring system is applied to some core cuttings collected from five boreholes in the Akinomiya district, Akita Prefecture, and the system is used for (1) the evaluation of homogenization temperatures of inclusions in the fluid, (2) the measurement of the points of melting from ice of inclusions in the fluid, and (3) the implementation of laser Raman spectroscopy. Under item (1), it is found that the minimum homogenization temperature of quartz phenocryst in the mother rock or of low-salinity fluid inclusion in a quartz vein is near the current subsurface temperature and that subsurface and reservoir temperatures may be known by evaluating their homogenization temperature. Under item (2), it is found that the NaCl equivalent salinity is distributed in the range of 0.0 to 25wt% and that, in this connection, there is difference between a fluid in a fluid flow and a fluid spurting as thermal water in the Akinomiya district. Under item (3), CO2, N{sub 2}, and CH{sub 4} are detected in most of the boreholes. Efforts are exerted to develop a hydrothermal fluid analyzing technique using a rapid rock dating method and traces of chemical ingredients in hydrothermal minerals. (NEDO)

  7. Geothermal resources - legal foundations of exploration and exploitation; Erdwaerme - Rechtsgrundlagen der Erkundung und Gewinnung

    Energy Technology Data Exchange (ETDEWEB)

    Nast, K [Landesbergamt Baden-Wuerttemberg, Freiburg im Breisgau (Germany)

    1997-12-01

    Exploration and exploitation of teothermal heat are subject to the German Mining Law of 1 January 1982. Geothermal heat as defined by this law is the total thermal energy contained in the earth`s interior. There are certain limitations to the application of mining law depending on the purpose of geothermal heat use. In Baden-Wuerttemberg, geothermal heat is utilized in the form of thermal water (`single borehole technique`), subject to licensing under mining law, approved plans of operation, and permits under water law. The responsible authority is the Baden-Wueerttemberg mining bureau at Freiburg. (orig.) [Deutsch] Die Erkundung und Gewinnung von Erdwaerme wird mit Inkrafttreten des Bundesberggesetzes am 1. Januar 1982 erstmals gesetzlich geregelt. Erdwaerme im Sinne dieses Gesetzes ist die gesamte im Erdinnern vorhandene thermische Energie. Fuer die Anwendung des Bergrechts gibt es gewisse Einschraenkungen, die insbesondere vom Zweck der Erdwaermeerschliessung abhaengen. - In Baden-Wuerttemberg wird Erdwaerme auf bergrechtlicher Grundlage in Form von Thermalwasser gewonnen (`Einbohlrlichverfahren`). Erforderliche Genehmigungen hierfuer sind im wesentlichen die bergrechtliche Erlaubnis bzw. Bewilligung, Betriebsplanzulassungen und wasserrrechtliche Erlaubnisse. Das Landesbergamt Baden-Wuerttemberg in Freiburg ist die fuer Erdwaermeprojekte zustaendige Genehmigungs- und Aufsichtsbehoerde. (orig.)

  8. Technologies for the Comprehensive Exploitation of the Geothermal Resources of the North Caucasus Region

    Science.gov (United States)

    Alkhasov, A. B.

    2018-03-01

    Technology for the integrated development of low-temperature geothermal resources using the thermal and water potentials for various purposes is proposed. The heat of the thermal waters is utilized in a low-temperature district heating system and for heating the water in a hot water supply system. The water cooled in heat exchangers enters a chemical treatment system where it is conditioned into potable water quality and then forwarded to the household and potable water supply system. Efficient technologies for removal of arsenic and organic contaminants from the water have been developed. For the uninterrupted supply of the consumers with power, the technologies that use two and more types of renewable energy sources (RESs) have the best prospects. Technology for processing organic waste using the geothermal energy has been proposed. According to this technology, the geothermal water is divided into two flows, one of which is delivered to a biomass conversion system and the other is directed to a geothermal steam-gas power plant (GSGP). The wastewater arrives at the pump station from which it is pumped back into the bed. Upon drying, the biogas from the conversion system is delivered into the combustion chamber of a gas-turbine plant (GTP). The heat of the turbine exhaust gases is used in the GSGP to evaporate and reheat the low-boiling working medium. The working medium is heated in the GSGP to the evaporation temperature using the heat of the thermal water. High-temperature geothermal brines are the most promising for the comprehensive processing. According to the proposed technology, the heat energy of the brines is utilized to generate the electric power at a binary geothermal power station; the electric power is then used to extract the dissolved chemical components from the rest of the brine. The comprehensive utilization of high-temperature brines of the East-Precaucasian Artesian Basin will allow to completely satisfy the demand of Russia for lithium

  9. Surface geothermal exploration in the Canary Islands by means of soil CO_{2} degassing surveys

    Science.gov (United States)

    García-Merino, Marta; Rodríguez, Fátima; Padrón, Eleazar; Melián, Gladys; Asensio-Ramos, María; Barrancos, José; Hernández, Pedro A.; Pérez, Nemesio M.

    2017-04-01

    With the exception of the Teide fumaroles, there is not any evidence of hydrothermal fluid discharges in the surficial environment of the Canary Islands, the only Spanish territory with potential high enthalpy geothermal resources. Here we show the results of several diffuse CO2 degassing surveys carried out at five mining licenses in Tenerife and Gran Canaria with the aim of sorting the possible geothermal potential of these five mining licenses. The primary objective of the study was to reduce the uncertainty inherent to the selection of the areas with highest geothermal potential for future exploration works. The yardstick used to classify the different areas was the contribution of volcano-hydrothermal CO2 in the diffuse CO2 degassing at each study area. Several hundreds of measurements of diffuse CO2 emission, soil CO2 concentration and isotopic composition were performed at each mining license. Based in three different endmembers (biogenic, atmospheric and deep-seated CO2) with different CO2 concentrations (100, 0.04 and 100%, respectively) and isotopic compositions (-24, -8 and -3 per mil vs. VPDB respectively) a mass balance to distinguish the different contribution of each endmember in the soil CO2 at each sampling site was made. The percentage of the volcano-hydrothermal contribution in the current diffuse CO2 degassing was in the range 0-19%. The Abeque mining license, that comprises part of the north-west volcanic rift of Tenerife, seemed to show the highest geothermal potential, with an average of 19% of CO2 being released from deep sources, followed by Atidama (south east of Gran Canaria) and Garehagua (southern volcanic rift of Tenerife), with 17% and 12% respectively.

  10. Thermo-mechanical models of the European lithosphere for geothermal exploration

    Science.gov (United States)

    Limberger, Jon; van Wees, Jan-Diederik; Tesauro, Magdala; Bonté, Damien; Lipsey, Lindsay; Beekman, Fred; Cloetingh, Sierd

    2015-04-01

    One of the critical exploration parameters for geothermal systems is the subsurface temperature. Temperature data are reliable up to a depth of 1 km in most parts of Europe. Accordingly, the robustness of temperature estimation rapidly decreases with depth, as temperature data from wells become sparser and unevenly distributed. We developed a two-layer temperature model for assessing the prospective resource base of enhanced geothermal systems in Europe. The surface heat flow and the Moho depth were used to constrain the radiogenic heat production in the upper crust. Only conduction was considered for heat transfer. The most recent and comprehensive regional temperature models and maps available were directly used to constrain the 3D temperature distribution up to a depth of 6 km. The model shows high average geothermal gradients of up to 60 °C in volcanically active regions such as Iceland, parts of Italy, Greece and Turkey. Temperatures at 5 km depth range between 40 °C and 310 °C and at 10 km depth between 80 °C and 590 °C. However, this direct use of regional models is not fully consistent with the calculated and observed heat flow. Furthermore, only fixed thermal conductivity values were assigned to the sediments and the crystalline basement. As part of the EU FP7-funded Integrated Methods for Advanced Geothermal Exploration (IMAGE) project we are going to develop a methodology to obtain a more advanced 3D lithosphere-scale thermal model of Europe. This will include a more realistic distribution of thermal properties, according with lithological variations of the European crust. Further improvements of the thermal model, aiming at consistency between temperature and heat flow observations and tectonic model predictions, will be obtained by adopting data assimilation techniques derived from reservoir engineering best practices. The newly derived thermal model of the European lithosphere together with compositional data will be used to estimate the strength

  11. Geothermal Exploration By Using Time Domain IP Method:Balikesir (Gure) And Canakkale (Geyikli) Cases From Turkey

    Science.gov (United States)

    Tezel, O.; Ozcep, F.

    2017-12-01

    Geothermal energy is heat derived from the earth. It is the thermal energy contained in the rock and fluid (that fills the fractures and pores within the rock) in the earth's crust. These resources are always at a temperature higher than 20°C. Geothermal energy requires no fuel, and is therefore virtually emission free and independent of fluctuations in fuel cost. Since a geothermal power plant doesn't rely on transient sources of energy, unlike, for example, wind turbines or solar panels, its capacity factor can be quite large. Induced polarization (IP) results at geothermal regions show prominent, extended low resistivity zones. Environmental-IP methods can assist in the assessment of the acid generating potential of waste rock and tailings from mine operations. Resistivity can be used to map contamination plumes. Resistivity and chargeability values were determined using the IP method on geothermal resources in Balikesir Güre (Turkey). In this study we found low resistance values and high chargeability values at the geothermal resource. Finally drilling and IP results were correlated to verify our findings. After the positive results of obtained data, a similar study was carried out in Geyikli Area (Canakkale) and a geothermal resource with 450C temperature of 5 lt/sec was explored at a depth of 970 m.

  12. A hybrid geothermal energy conversion technology: Auxiliary heating of geothermally preheated water or CO2 - a potential solution for low-temperature resources

    Science.gov (United States)

    Saar, Martin; Garapati, Nagasree; Adams, Benjamin; Randolph, Jimmy; Kuehn, Thomas

    2016-04-01

    Safe, sustainable, and economic development of deep geothermal resources, particularly in less favourable regions, often requires employment of unconventional geothermal energy extraction and utilization methods. Often "unconventional geothermal methods" is synonymously and solely used as meaning enhanced geothermal systems, where the permeability of hot, dry rock with naturally low permeability at greater depths (4-6 km), is enhanced. Here we present an alternative unconventional geothermal energy utilization approach that uses low-temperature regions that are shallower, thereby drastically reducing drilling costs. While not a pure geothermal energy system, this hybrid approach may enable utilization of geothermal energy in many regions worldwide that can otherwise not be used for geothermal electricity generation, thereby increasing the global geothermal resource base. Moreover, in some realizations of this hybrid approach that generate carbon dioxide (CO2), the technology may be combined with carbon dioxide capture and storage (CCS) and CO2-based geothermal energy utilization, resulting in a high-efficiency (hybrid) geothermal power plant with a negative carbon footprint. Typically, low- to moderate-temperature geothermal resources are more effectively used for direct heat energy applications. However, due to high thermal losses during transport, direct use requires that the heat resource is located near the user. Alternatively, we show here that if such a low-temperature geothermal resource is combined with an additional or secondary energy resource, the power production is increased compared to the sum from two separate (geothermal and secondary fuel) power plants (DiPippo et al. 1978) and the thermal losses are minimized because the thermal energy is utilized where it is produced. Since Adams et al. (2015) found that using CO2 as a subsurface working fluid produces more net power than brine at low- to moderate-temperature geothermal resource conditions, we

  13. Geothermal energy

    OpenAIRE

    Manzella A.

    2017-01-01

    Geothermal technologies use renewable energy resources to generate electricity and direct use of heat while producing very low levels of greenhouse-gas (GHG) emissions. Geothermal energy is the thermal energy stored in the underground, including any contained fluid, which is available for extraction and conversion into energy products. Electricity generation, which nowadays produces 73.7 TWh (12.7 GW of capacity) worldwide, usually requires geothermal resources temperatures of over 100 °C. Fo...

  14. Geothermal exploration

    International Nuclear Information System (INIS)

    Hardison, J.E.

    1975-01-01

    A uranium prospecting system based on the determination of temperature anomalies in the earth's crust is described. The earth heat flux is measured at preselected points in shallow boreholes in order to detect heat given off as a result of radioactive decay. Localized anomalies are indicative of concentrations of radioactive materials

  15. Geothermal heat pumps, a booming technology in North America; Geothermal Heat Pumps - der Boom der oberflaechennahen Geothermie in Nordamerika

    Energy Technology Data Exchange (ETDEWEB)

    Sanner, B [Giessen Univ. (Germany). Inst. fuer Angewandte Geowissenschaften

    1997-12-01

    Over the last years, the interest in and the use of ground-source heat pumps has substantially increased in North America. In a market dominated by space cooling heat pumps can show clearly their advantages. This paper describes the development in Canada and USA, gives examples of the technologies used and presents some large plants. The differences to the Central European situation are discussed. Also mentioned are the various activities in market penetration, which peaked in the foundation of the `Geothermal Heat Pump Consortium` in Washington in 1994. (orig.) [Deutsch] In den letzten Jahren hat das Interesse an und der Einsatz von erdgekoppelten Waermepumpen in Nordamerika stark zugenommen. In einem von der Raumkuehlung dominierten Markt koennen Waermepumpen ihre Vorteile voll ausspielen. Der Beitrag beschreibt die Entwicklung in Kanada und den USA, stellt Beispiele der eingesetzten Technik vor und geht auf einige Grossanlagen ein. Ausserdem werden die Unterschiede zu der Situation in Mitteleuropa herausgearbeitet und die verschiedenen Aktivitaeten zu `Markt Penetration` behandelt, die 1994 in die Gruendung des `Geothermal Heat Pump Consortiums` in Washington muendeten. (orig.)

  16. Geothermal energy

    International Nuclear Information System (INIS)

    Laplaige, Ph.; Lemale, J.

    2008-01-01

    Geothermal energy is a renewable energy source which consists in exploiting the heat coming from the Earth. It covers a wide range of techniques and applications which are presented in this article: 1 - the Earth, source of heat: structure of the Earth, geodynamic model and plate tectonics, origin of heat, geothermal gradient and terrestrial heat flux; 2 - geothermal fields and resources; 3 - implementation of geothermal resources: exploration, main characteristic parameters, resource exploitation; 4 - uses of geothermal resources: power generation, thermal uses, space heating and air conditioning heat pumps, district heating, addition of heat pumps; 5 - economical aspects: power generation, heat generation for district heating; 6 - environmental aspects: conditions of implementation, impacts as substitute to fossil fuels; 7 - geothermal energy in France: resources, organisation; 8 - conclusion. (J.S.)

  17. Community Geothermal Technology Program: Cloth dyeing by geothermal steam. An experiment in technology transfer from Japan to Hawaii, Final report

    Energy Technology Data Exchange (ETDEWEB)

    Furumoto, A.S.

    1987-12-31

    This was an experiment to test whether cloth dyeing using geothermal steam (already proven in Japan) would be feasible in Hawaii. Results: Using a fabricated steam vat, cotton, silk, and synthetic can be dyed; the resulting material received high grades for steadfastness and permanency under dye testing. Techniques that were successful in Matsukawa, were replicated in Puna. However, attempts to embed leaf patterns on cloth using natural leaves and to extract natural dyes from Hawaiian plants were unsuccessful; the color of natural dyes deteriorated in hours. But chemical dyes gave brilliant hues or shades, in contrast to those in Japan where the steam there gave subdued tones. It is concluded that geothermal dyeing can be a viable cottage industry in Puna, Hawaii.

  18. 76 FR 38648 - Availability of the Geothermal Technologies Program Blue Ribbon Panel Report and Request for...

    Science.gov (United States)

    2011-07-01

    ....S. has lagged that of solar and wind energy. The purpose of the Blue Ribbon Panel meeting was to... Geothermal Technologies Program Blue Ribbon Panel Report and Request for Public Comment AGENCY: Office of... Panel (the Panel) on March 22/23, 2011 in Albuquerque, New Mexico for a guided discussion on the future...

  19. New NASA Technologies for Space Exploration

    Science.gov (United States)

    Calle, Carlos I.

    2015-01-01

    NASA is developing new technologies to enable planetary exploration. NASA's Space Launch System is an advance vehicle for exploration beyond LEO. Robotic explorers like the Mars Science Laboratory are exploring Mars, making discoveries that will make possible the future human exploration of the planet. In this presentation, we report on technologies being developed at NASA KSC for planetary exploration.

  20. Magnetic mapping for structural geology and geothermal exploration in Guadeloupe, Lesser Antilles

    Science.gov (United States)

    Mercier de Lépinay, jeanne; munschy, marc; geraud, yves; diraison, marc; navelot, vivien; verati, christelle; corsini, michel; lardeaux, jean marc; favier, alexiane

    2017-04-01

    This work is implemented through the GEOTREF program which benefits from the support of both the ADEME and the French public funds "Investments for the future". The program focuses on the exploration for geothermal resources in Guadeloupe, Lesser Antilles, where a geothermal power plant is in production since 1986 (Bouillante, Basse Terre). In Les Saintes archipelago, in the south of Guadeloupe, the outcrop analysis of Terre-de-Haut Island allows to point out an exhumed geothermal paleo-system that is thought to be an analogue of the Bouillante active geothermal system. We show that a detailed marine magnetic survey with a quantitative interpretation can bring information about the offshore structures around Les Saintes archipelago in order to extend the geological limits and structural elements. A similar survey and workflow is also conducted offshore Basse-Terre where more geophysical data is already available. In order to correctly link the offshore and onshore structures, the magnetic survey must be close enough to the shoreline and sufficiently detailed to correctly outline the tectonic structures. An appropriate solution for such a survey is to use a three component magnetometer aboard a speedboat. Such a boat allows more navigation flexibility than a classic oceanic vessel towing a magnetometer; it can sail at higher speed on calm seas and closer to the shoreline. This kind of magnetic acquisition is only viable because the magnetic effect of the ship can be compensated using the same algorithms than those used for airborne magnetometry. The use of potential field transforms allows a large variety of structures to be highlighted, providing insights to build a general understanding of the nature and distribution of the magnetic sources. In particular, we use the tilt angle operator to better identify the magnetic lineaments offshore in order to compare them to the faults identified onshore during the outcrop analysis. All the major faults and fractures

  1. Geological and thermal exploration for an evaluation of the geothermal potential of Luxembourg

    Science.gov (United States)

    Schintgen, Tom; Förster, Andrea

    2013-04-01

    north-west to the Saar-Nahe (or Saar-Lorraine) Basin in the southeast. The results obtained from the thermal model will provide basic information for future geothermal exploration and different types of geothermal use.

  2. Fiscal 1999 research and verification of geothermal energy exploring technologies and the like. Development of reservoir mass and heat flow characterization (Development of gravity monitoring technology - Summary); 1999 nendo chinetsu tansa gijutsu nado kensho chosa hokokusho (yoyaku). Choryuso hendo tansaho kaihatsu (Juryoku tansaho kaihatsu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    For developing a natural state simulation system to enable the seizure of reservoir characteristics from gravity changes, a gravity measuring network system is about to be constructed in the Nishiyama district, Yanaizu-machi, Kawanuma-gun, Fukushima Prefecture, where a geothermal power station is situated. The work centers about (1) the construction of a gravity measuring network system, (2) the development of a borehole gravimeter utilization technology, and (3) the development of analysis/evaluation technologies. Under item (1), 138 gravity measuring stations and 10 groundwater measuring stations are completed, and continuous and periodic measurements of gravity and groundwater levels are carried out. Furthermore, gravimeters are calibrated, and the elevation, latitude, and longitude are precisely determined for each of the measuring stations. Under item (2), model calculations are conducted for the Nishiyama district boreholes, as a step preparatory to borehole gravity measuring, by investigating the records of actual operation of equipment and by operating a reservoir simulation system. Under item (3), measures to deal with factors that impede precise measurement and conditions to meet for the analysis of gravity changes are studied, and efforts are started to construct the said natural state simulation system. (NEDO)

  3. Internal structure of the Aar Massif: What can we learn in terms of exploration for deep geothermal energy?

    Science.gov (United States)

    Herwegh, Marco; Baumberger, Roland; Wehrens, Philip; Schubert, Raphael; Berger, Alfons; Maeder, Urs; Spillmann, Thomas

    2014-05-01

    The successful use of deep geothermal energy requires 3D flow paths, which allow an efficient heat exchange between the surrounding host rocks and the circulating fluids. Recent attempts to exploit this energy resource clearly demonstrate that the new technology is facing sever problems. Some major problems are related to the prediction of permeability, the 3D structure of the flow paths and the mechanical responses during elevated fluid pressures at depths of several kilometers. Although seemingly new in a technical perspective, nature is facing and solving similar problems since the beginning of the Alpine orogeny. Based on detailed studies in the Hasli Valley (Aar Massif) we can demonstrate that deformation and fluid flow are strongly localized along mechanical anisotropies (e.g. lithological variations, brittle and ductile faults). Some of them already evolved during Variscan and post-Variscan times. Interestingly, these inherited structures are reactivated over and over again during the Alpine orogeny. Their reactivation occurred at depths of ~13-15 km with elevated temperatures (400-475°C) and involved both ductile and brittle deformation processes. Brittle deformation in form of hydrofracking was always present due to the circulating fluids. It is this process, which was and still is responsible for seismic activity. With progressive uplift and exhumation of the Aar Massif, ductile deformation structures became replaced by brittle cataclasites and fault gouges during fault activity at shallower crustal levels. Existing hydrotest data from the Grimsel Test Site (Nagra's underground research laboratory) indicate that these brittle successors of the ductile shear zones are domains of enhanced recent fluid percolation. Note that although being exposed today, the continuation of these fault structures are still active at depth in both brittle and ductile deformation modes, a fact that can be inferred from recent uplift rates and the active seismicity. On the

  4. Enhanced Geothermal Systems (EGS) Well Construction Technology Evaluation Report

    Energy Technology Data Exchange (ETDEWEB)

    Polsky, Yarom [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Capuano, Louis [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Finger, John [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Huh, Michael [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Knudsen, Steve [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Chip, A.J. Mansure [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Raymond, David [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Swanson, Robert [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

    2008-12-01

    This report provides an assessment of well construction technology for EGS with two primary objectives: 1. Determining the ability of existing technologies to develop EGS wells. 2. Identifying critical well construction research lines and development technologies that are likely to enhance prospects for EGS viability and improve overall economics.

  5. Survey of subjects on the geothermal technology development aiming at marked improvement of economical efficiency; Keizaisei no hiyakuteki kojo to mezashita chinetsu gijutsu kaihatsu ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    For the purpose of reducing the geothermal development cost and increasing the amount of developable resource, the paper reviewed the geothermal developmental technology. Approximately 30 MW as a scale per unit is economical. The development cost is lowered by 2% if the period for development is shortened by two years, by 11% if the utilization rate is increased by 10%, and by 3% if the success rate is increased by 10%. The cost is reduced by 10% if the steam amount per 1 pit is increased to 1.5 times, and by 4% if the reduction amount is increased to 1.5 times. Improvement of survey/exploration/evaluation technology and improvement of power generation/management technology contribute largely to making the above possible. The drilling depth also corresponds with increases in the amount of steam obtained and the cost. The construction cost including the drilling cost is also an important factor, indicating a cost reduction of 15% if the unit price is reduced by 20%. If a 30% reduction of the power generation cost at a 30MW plant can be made, a 10 yen/kWh is realized, which shows that a geothermal power plant can be competitive with a thermal power plant. When thinking of it without subsidies, the geothermal power generation is most economical of all the renewable energy. In the light of the environment, the CO2 issue, etc., the geothermal power generation is much more advantageous than the thermal power generation. 7 refs., 28 figs., 8 tabs.

  6. Federal Geothermal Research Program Update, FY 2000

    Energy Technology Data Exchange (ETDEWEB)

    Renner, Joel Lawrence

    2001-08-01

    The Department of Energy's Geothermal Program serves two broad purposes: 1) to assist industry in overcoming near-term barriers by conducting cost-shared research and field verification that allows geothermal energy to compete in today's aggressive energy markets; and 2) to undertake fundamental research with potentially large economic payoffs. The four categories of work used to distinguish the research activities of the Geothermal Program during FY 2000 reflect the main components of real-world geothermal projects. These categories form the main sections of the project descriptions in this Research Update. Exploration Technology research focuses on developing instruments and techniques to discover hidden hydrothermal systems and to explore the deep portions of known systems. Research in geophysical and geochemical methods is expected to yield increased knowledge of hidden geothermal systems. Reservoir Technology research combines laboratory and analytical investigations with equipment development and field testing to establish practical tools for resource development and management for both hydrothermal reservoirs and enhanced geothermal systems. Research in various reservoir analysis techniques is generating a wide range of information that facilitates development of improved reservoir management tools. Drilling Technology focuses on developing improved, economic drilling and completion technology for geothermal wells. Ongoing research to avert lost circulation episodes in geothermal drilling is yielding positive results. Conversion Technology research focuses on reducing costs and improving binary conversion cycle efficiency, to permit greater use of the more abundant moderate-temperature geothermal resource, and on the development of materials that will improve the operating characteristics of many types of geothermal energy equipment. Increased output and improved performance of binary cycles will result from investigations in heat cycle research.

  7. Exploration of the enhanced geothermal system (EGS) potential of crystalline rocks for district heating (Elbe Zone, Saxony, Germany)

    Science.gov (United States)

    Förster, Andrea; Förster, Hans-Jürgen; Krentz, Ottomar

    2018-01-01

    This paper addresses aspects of a baseline geothermal exploration of the thermally quiescent Elbe Zone (hosting the cities of Meissen and Dresden) for a potential deployment of geothermal heat in municipal heating systems. Low-permeable to impermeable igneous and metamorphic rocks constitute the major rock types at depth, implying that an enhanced geothermal system needs to be developed by creating artificial flow paths for fluids to enhance the heat extraction from the subsurface. The study includes the development of geological models for two areas on the basis of which temperature models are generated at upper crustal scale. The models are parameterized with laboratory-measured rock thermal properties (thermal conductivity k, radiogenic heat production H). The uncertainties of modelled temperature caused by observed variations of k and H and inferred mantle heat flow are assessed. The study delineates highest temperatures within the intermediate (monzonite/syenite unit) and mafic rocks (diorite/monzodiorite unit) forming the deeper portions of the Meissen Massif and, specifically for the Dresden area, also within the low-metamorphic rocks (slates/phyllites/quartzites) of the Elbtalschiefergebirge. Boreholes 3-4 km deep need to be drilled to reach the envisioned economically favourable temperatures of 120 °C. The metamorphic and mafic rocks exhibit low concentrations of U and Th, thus being advantageous for a geothermal use. For the monzonite/syenite unit of high heat production ( 6 µW m-3) in the Meissen Massif, the mobilization of Th and U into the geothermal working fluid is assumed to be minor, although their various radioactive decay products will be omnipresent during geothermal use.

  8. Uncertainty analysis of geothermal energy economics

    Science.gov (United States)

    Sener, Adil Caner

    This dissertation research endeavors to explore geothermal energy economics by assessing and quantifying the uncertainties associated with the nature of geothermal energy and energy investments overall. The study introduces a stochastic geothermal cost model and a valuation approach for different geothermal power plant development scenarios. The Monte Carlo simulation technique is employed to obtain probability distributions of geothermal energy development costs and project net present values. In the study a stochastic cost model with incorporated dependence structure is defined and compared with the model where random variables are modeled as independent inputs. One of the goals of the study is to attempt to shed light on the long-standing modeling problem of dependence modeling between random input variables. The dependence between random input variables will be modeled by employing the method of copulas. The study focuses on four main types of geothermal power generation technologies and introduces a stochastic levelized cost model for each technology. Moreover, we also compare the levelized costs of natural gas combined cycle and coal-fired power plants with geothermal power plants. The input data used in the model relies on the cost data recently reported by government agencies and non-profit organizations, such as the Department of Energy, National Laboratories, California Energy Commission and Geothermal Energy Association. The second part of the study introduces the stochastic discounted cash flow valuation model for the geothermal technologies analyzed in the first phase. In this phase of the study, the Integrated Planning Model (IPM) software was used to forecast the revenue streams of geothermal assets under different price and regulation scenarios. These results are then combined to create a stochastic revenue forecast of the power plants. The uncertainties in gas prices and environmental regulations will be modeled and their potential impacts will be

  9. Geothermal exploration in the German Molasse Basin - Supplementary exploration using integrated 3-component data and shear wave measurements

    Science.gov (United States)

    Wawerzinek, Britta; Buness, Hermann; Lüschen, Ewald; Thomas, Rüdiger

    2017-04-01

    To establish a dense area-wide network of geothermal facilities, the Stadtwerke München initiated the joint research project GRAME together with the Leibniz Institute for Applied Geophysics (GeoParaMoL*). As a database for the project, a 3D seismic survey was acquired from November 1015 to March 2016 and covers 170 km2 of the southern part of Munich. 3D seismic exploration is a well-established method to explore geothermal reservoirs, and its value for reservoir characterization of the Malm has been proven by several projects. A particular challenge often is the determination of geophysical parameters for facies interpretation without any borehole information, which is needed for calibration. A new approach to facilitate a reliable interpretation is to include shear waves in the interpretation workflow, which helps to tie down the range of lithological and petrophysical parameters. Shear wave measurements were conducted during the regular 3D seismic survey in Munich. In a passive experiment, the survey was additionally recorded on 467 single, 3-component (3C), digital receivers that were deployed along one main line (15 km length) and two crosslines (4 km length). In this way another 3D P-wave as well as a 3D shear wave dataset were acquired. In the active shear wave experiment the SHOVER technique (Edelmann, 1981) was applied to directly excite shear waves using standard vertical vibrators. The 3C recordings of both datasets show, in addition to the P-wave reflections on the vertical component, clear shear-wave signals on the horizontal components. The structural image of the P-waves recorded on the vertical component of the 3C receivers displays clear reflectors within the Molasse Basin down to the Malm and correlates well with the structural image of the regular survey. Taking into account a travel time ratio of 1.6 the reflection patterns of horizontal and vertical components approximately coincide. This indicates that Molasse sediments and the Malm can also

  10. Structural analysis and thermal remote sensing of the Los Humeros Volcanic Complex: Implications for volcano structure and geothermal exploration

    Science.gov (United States)

    Norini, G.; Groppelli, G.; Sulpizio, R.; Carrasco-Núñez, G.; Dávila-Harris, P.; Pellicioli, C.; Zucca, F.; De Franco, R.

    2015-08-01

    occurrence of hydrothermal fluids is controlled by fault-induced secondary permeability. The resurgence of the caldera floor could be induced by an inferred magmatic intrusion, representing the heat source of the geothermal system and feeding the simultaneous monogenetic volcanic activity around the deforming area. The operation of the geothermal field and the plans for further exploration should focus on, both, the active resurgence fault system and the new endogenous thermal anomalies mapped outside the known boundaries of the geothermal field.

  11. Geothermal Information Dissemination and Outreach

    Energy Technology Data Exchange (ETDEWEB)

    Clutter, Ted J. [Geothermal Resources Council (United States)

    2005-02-18

    Project Purpose. To enhance technological and topical information transfer in support of industry and government efforts to increase geothermal energy use in the United States (power production, direct use, and geothermal groundsource heat pumps). Project Work. GRC 2003 Annual Meeting. The GRC convened the meeting on Oct. 12-15, 2003, at Morelia's Centro de Convenciones y ExpoCentro in Mexico under the theme, International Collaboration for Geothermal Energy in the Americas. The event was also sponsored by the Comision Federal de Electricidad. ~600 participants from more than 20 countries attended the event. The GRC convened a Development of Geothermal Projects Workshop and Geothermal Exploration Techniques Workshop. GRC Field Trips included Los Azufres and Paricutin Volcano on Oct. 11. The Geothermal Energy Association (Washington, DC) staged its Geothermal Energy Trade Show. The Annual Meeting Opening Session was convened on Oct. 13, and included the governor of Michoacan, the Mexico Assistant Secretary of Energy, CFE Geothermal Division Director, DOE Geothermal Program Manager, and private sector representatives. The 2003 Annual Meeting attracted 160 papers for oral and poster presentations. GRC 2004. Under the theme, Geothermal - The Reliable Renewable, the GRC 2004 Annual Meeting convened on Aug. 29-Sept. 1, 2004, at the Hyatt Grand Champions Resort at Indian Wells, CA. Estimated total attendance (including Trade Show personnel, guests and accompanying persons) was ~700. The event included a workshop, Geothermal Production Well Pump Installation, Operation and Maintenance. Field trips went to Coso/Mammoth and Imperial Valley/Salton Sea geothermal fields. The event Opening Session featured speakers from the U.S. Department of Energy, U.S. Department of the Interior, and the private sector. The Geothermal Energy Association staged its Geothermal Energy Trade Show. The Geothermal Education Office staged its Geothermal Energy Workshop. Several local radio and

  12. Geothermal energy

    Directory of Open Access Journals (Sweden)

    Manzella A.

    2017-01-01

    Full Text Available Geothermal technologies use renewable energy resources to generate electricity and direct use of heat while producing very low levels of greenhouse-gas (GHG emissions. Geothermal energy is the thermal energy stored in the underground, including any contained fluid, which is available for extraction and conversion into energy products. Electricity generation, which nowadays produces 73.7 TWh (12.7 GW of capacity worldwide, usually requires geothermal resources temperatures of over 100 °C. For heating, geothermal resources spanning a wider range of temperatures can be used in applications such as space and district heating (and cooling, with proper technology, spa and swimming pool heating, greenhouse and soil heating, aquaculture pond heating, industrial process heating and snow melting. Produced geothermal heat in the world accounts to 164.6 TWh, with a capacity of 70.9 GW. Geothermal technology, which has focused for decades on extracting naturally heated steam or hot water from natural hydrothermal reservoirs, is developing to more advanced techniques to exploit the heat also where underground fluids are scarce and to use the Earth as a potential energy battery, by storing heat. The success of the research will enable energy recovery and utilization from a much larger fraction of the accessible thermal energy in the Earth’s crust.

  13. Geothermal energy

    Science.gov (United States)

    Manzella, A.

    2017-07-01

    Geothermal technologies use renewable energy resources to generate electricity and direct use of heat while producing very low levels of greenhouse-gas (GHG) emissions. Geothermal energy is the thermal energy stored in the underground, including any contained fluid, which is available for extraction and conversion into energy products. Electricity generation, which nowadays produces 73.7 TWh (12.7 GW of capacity) worldwide, usually requires geothermal resources temperatures of over 100 °C. For heating, geothermal resources spanning a wider range of temperatures can be used in applications such as space and district heating (and cooling, with proper technology), spa and swimming pool heating, greenhouse and soil heating, aquaculture pond heating, industrial process heating and snow melting. Produced geothermal heat in the world accounts to 164.6 TWh, with a capacity of 70.9 GW. Geothermal technology, which has focused for decades on extracting naturally heated steam or hot water from natural hydrothermal reservoirs, is developing to more advanced techniques to exploit the heat also where underground fluids are scarce and to use the Earth as a potential energy battery, by storing heat. The success of the research will enable energy recovery and utilization from a much larger fraction of the accessible thermal energy in the Earth's crust.

  14. Exploration of Ulumbu geothermal field, Flores-east nusa tenggara, Indonesia

    Energy Technology Data Exchange (ETDEWEB)

    Sulasdi, Didi

    1996-01-26

    This paper describes the progress made in developing geothermal resources at Ulumbu Flores, Indonesia for utilization mini geothermal power generation. Two deep exploratory wells drilling drilled by PLN confirmed the existence of the resources. The well measurement carried out during drilling and after completion of the well indicated that the major permeable zone at around 680 m depth and that this zone is a steam cap zone, which is likely to produce high enthalpy steam. The above information indicates that well ULB-01 will produce a mass flow at least 40 tonnes per hour, which will ensure a 3 MW (E) Ulumbu mini geothermal power plant.

  15. Guidebook to Geothermal Finance

    Energy Technology Data Exchange (ETDEWEB)

    Salmon, J. P.; Meurice, J.; Wobus, N.; Stern, F.; Duaime, M.

    2011-03-01

    This guidebook is intended to facilitate further investment in conventional geothermal projects in the United States. It includes a brief primer on geothermal technology and the most relevant policies related to geothermal project development. The trends in geothermal project finance are the focus of this tool, relying heavily on interviews with leaders in the field of geothermal project finance. Using the information provided, developers and investors may innovate in new ways, developing partnerships that match investors' risk tolerance with the capital requirements of geothermal projects in this dynamic and evolving marketplace.

  16. Report (summarized) for fiscal 2000 on survey for demonstration of geothermal exploration technologies. Development of exploration method using reservoir bed fluctuation (Theme 2. Development of gravitation exploration method); 2000 nendo chinetsu tansa gijutsu to kensho chosa hokokusho (yoyaku). Choryuso hendo tansaho kaihatsu - 2 (juryoku tansaho kaihatsu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    R and D has been performed on a method to identify change in the gravity generated by steam production activities, and to forecast spread of the reservoir beds and future variation, as a technology effective to evaluate reservoir beds in the initial stage of development, to maintain output stability of power plants after having started the operation and to extract reservoirs existing in the vicinity of areas that have already been developed. This paper summarizes the achievements in fiscal 2000. With regard to structuring a gravitation measurement network system, ten gravity measurement points were modified and/or newly installed. The result of concentrated measurements during the current fiscal year revealed how the gravity varies before and after suspension of the steam production in association with regular repair works. Other works included patrolling gravity measurements in ten water level observation well drilling points, GPS measurements on all the gravity measurement points, continuous ground water level observation, and water content measurement for TDR soil. In the gravity variation analysis, it was indicated that the gravity variation at No. 5 hole site, the ground water level fluctuation, and the water content change in TDR soil have definite correlation with the seasonal variation. Discussions were given on a method for correction thereof. (NEDO)

  17. Report (summarized) for fiscal 2000 on survey for demonstration of geothermal exploration technologies. Development of exploration method using reservoir bed fluctuation (Theme 5-1. Reservoir fluctuation forecasting technology); 2000 nendo chinetsu tansa gijutsu to kensho chosa hokokusho (yoyaku). Choryuso hendo tansaho kaihatsu - 5-1 (choryuso hendo yosoku gijutsu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    With an objective of developing a method effective to evaluate reservoir beds in the initial stage of development, to maintain output stability of power plants after having started the operation and to extract reservoirs existing in the vicinity of areas that have already been developed, R and D has been performed in relation with a reservoir simulator on post processors for gravity, SP, and resistivity, and on reservoir modeling. This paper summarizes the achievements in fiscal 2000. In developing the resistivity post processor, a prototype was completed. In developing the resistivity post processor for MT/CSAMT method, an analysis code was structured, and an input/output format was discussed. In developing the seismic wave post processor, a seismic wave characteristics fluctuation model was formulated. Regarding the input/output aiding GUI tools, a conceptual design was made. In developing the reservoir modeling technology, production forecasting simulation using a porous model and an MINC model was performed for the Sumikawa area. Based on the result thereof, forecast calculation was carried out on gravity change, resistivity change and natural potential change. (NEDO)

  18. Low-Temperature Projects of the Department of Energy's Geothermal Technologies Program: Evaluation and Lessons Learned: Preprint

    Energy Technology Data Exchange (ETDEWEB)

    Williams, Tom; Snyder, Neil; Gosnold, Will

    2016-12-01

    This paper discusses opportunities and challenges related to the technical and economic feasibility of developing power generation from geothermal resources at temperatures of 150 degrees C and lower. Insights from projects funded by the U.S. Department of Energy (DOE), Geothermal Technologies Office inform these discussions and provide the basis for some lessons learned to help guide decisions by DOE and the industry in further developing this resource. The technical basis for low-temperature geothermal energy is well established and the systems can be economic today in certain situations. However, these applications are far from a 'plug and play' product; successful development today requires a good knowledge of geothermal system design and operation.

  19. Low-Temperature Projects of the Department of Energy's Geothermal Technologies Program: Evaluation and Lessons Learned

    Energy Technology Data Exchange (ETDEWEB)

    Williams, Tom; Snyder, Neil; Gosnold, Will

    2016-10-23

    This paper discusses opportunities and challenges related to the technical and economic feasibility of developing power generation from geothermal resources at temperatures of 150 degrees C and lower. Insights from projects funded by the U.S. Department of Energy (DOE), Geothermal Technologies Office inform these discussions and provide the basis for some lessons learned to help guide decisions by DOE and the industry in further developing this resource. The technical basis for low-temperature geothermal energy is well established and the systems can be economic today in certain situations. However, these applications are far from a 'plug and play' product; successful development today requires a good knowledge of geothermal system design and operation.

  20. Geothermal Energy in the Pacific Region. Appendix A: Exploration for a Geothermal System in the Lualualei Valley, Oahu, Hawaii. Appendix B: Exploration on Adak Island Alaska

    Science.gov (United States)

    1975-05-01

    hydrological conditions in the area including rate and direction of pround water move-- ment have to be considered. Because movement of ground water can carry...L "s ’ ~~Y Wtb 92.5 \\7 mile Fiur 10 rudtmeauempo*h uljliN vlM g znbsdo Le s re e t mad at I m d pt 27 U surface cover or by the movement of the...on the Development and Utilization of Geothermal Resources, Pisa, 1970, IV/5j Furgerson, R. B., 1970, A controlled-source telluric current technique

  1. Federal Geothermal Research Program Update Fiscal Year 1998

    Energy Technology Data Exchange (ETDEWEB)

    Keller, J.G.

    1999-05-01

    This report reviews the specific objectives, status, and accomplishments of DOE's Geothermal Research Program for Fiscal Year 1998. The Exploration Technology research area focuses on developing instruments and techniques to discover hidden hydrothermal systems and to expose the deep portions of known systems. The Reservoir Technology research combines laboratory and analytical investigations with equipment development and field testing to establish practical tools for resource development and management for both hydrothermal and hot dry rock reservoirs. The Drilling Technology projects focus on developing improved, economic drilling and completion technology for geothermal wells. The Conversion Technology research focuses on reducing costs and improving binary conversion cycle efficiency, to permit greater use of the more abundant moderate-temperature geothermal resource, and on the development of materials that will improve the operating characteristics of many types of geothermal energy equipment. Direct use research covers the direct use of geothermal energy sources for applications in other than electrical production.

  2. Exploration of mobile educational technology

    OpenAIRE

    Hosny, W.

    2007-01-01

    Recent advances in mobile and wireless technology could be utilised to enhance the delivery of educational programmes. The use of this technology is known as “Mobile Education”. Mobile education technology provides unique opportunities for educators to flexibly deliver their educational material to learners via mobile services anywhere at any time. Moreover, the material delivered could be adapted to the learners’ needs and preferences. Examples of mobile devices which could be used in mobile...

  3. Technology for Increasing Geothermal Energy Productivity. Computer Models to Characterize the Chemical Interactions of Geothermal Fluids and Injectates with Reservoir Rocks, Wells, Surface Equipment

    International Nuclear Information System (INIS)

    Nancy Moller Weare

    2006-01-01

    This final report describes the results of a research program we carried out over a five-year (3/1999-9/2004) period with funding from a Department of Energy geothermal FDP grant (DE-FG07-99ID13745) and from other agencies. The goal of research projects in this program were to develop modeling technologies that can increase the understanding of geothermal reservoir chemistry and chemistry-related energy production processes. The ability of computer models to handle many chemical variables and complex interactions makes them an essential tool for building a fundamental understanding of a wide variety of complex geothermal resource and production chemistry. With careful choice of methodology and parameterization, research objectives were to show that chemical models can correctly simulate behavior for the ranges of fluid compositions, formation minerals, temperature and pressure associated with present and near future geothermal systems as well as for the very high PT chemistry of deep resources that is intractable with traditional experimental methods. Our research results successfully met these objectives. We demonstrated that advances in physical chemistry theory can be used to accurately describe the thermodynamics of solid-liquid-gas systems via their free energies for wide ranges of composition (X), temperature and pressure. Eight articles on this work were published in peer-reviewed journals and in conference proceedings. Four are in preparation. Our work has been presented at many workshops and conferences. We also considerably improved our interactive web site (geotherm.ucsd.edu), which was in preliminary form prior to the grant. This site, which includes several model codes treating different XPT conditions, is an effective means to transfer our technologies and is used by the geothermal community and other researchers worldwide. Our models have wide application to many energy related and other important problems (e.g., scaling prediction in petroleum

  4. The Oregon Geothermal Planning Conference

    Energy Technology Data Exchange (ETDEWEB)

    None

    1980-10-02

    Oregon's geothermal resources represent a large portion of the nation's total geothermal potential. The State's resources are substantial in size, widespread in location, and presently in various stages of discovery and utilization. The exploration for, and development of, geothermal is presently dependent upon a mixture of engineering, economic, environmental, and legal factors. In response to the State's significant geothermal energy potential, and the emerging impediments and incentives for its development, the State of Oregon has begun a planning program intended to accelerate the environmentally prudent utilization of geothermal, while conserving the resource's long-term productivity. The program, which is based upon preliminary work performed by the Oregon Institute of Technology's Geo-Heat Center, will be managed by the Oregon Department of Energy, with the assistance of the Departments of Economic Development, Geology and Mineral Industries, and Water Resources. Funding support for the program is being provided by the US Department of Energy. The first six-month phase of the program, beginning in July 1980, will include the following five primary tasks: (1) coordination of state and local agency projects and information, in order to keep geothermal personnel abreast of the rapidly expanding resource literature, resource discoveries, technological advances, and each agency's projects. (2) Analysis of resource commercialization impediments and recommendations of incentives for accelerating resource utilization. (3) Compilation and dissemination of Oregon geothermal information, in order to create public and potential user awareness, and to publicize technical assistance programs and financial incentives. (4) Resource planning assistance for local governments in order to create local expertise and action; including a statewide workshop for local officials, and the formulation of two specific community resource development

  5. Geothermal energy

    Directory of Open Access Journals (Sweden)

    Manzella A.

    2015-01-01

    Full Text Available Geothermal technologies use renewable energy resources to generate electricity and direct use of heat while producing very low levels of greenhouse-gas (GHG emissions. Geothermal energy is stored in rocks and in fluids circulating in the underground. Electricity generation usually requires geothermal resources temperatures of over 100°C. For heating, geothermal resources spanning a wider range of temperatures can be used in applications such as space and district heating (and cooling, with proper technology, spa and swimming pool heating, greenhouse and soil heating, aquaculture pond heating, industrial process heating and snow melting. Geothermal technology, which has focused so far on extracting naturally heated steam or hot water from natural hydrothermal reservoirs, is developing to more advanced techniques to exploit the heat also where underground fluids are scarce and to use the Earth as a potential energy battery, by storing heat. The success of the research will enable energy recovery and utilization from a much larger fraction of the accessible thermal energy in the Earth’s crust.

  6. Geothermal handbook

    Science.gov (United States)

    1976-01-01

    The Bureau of Land Management offered over 400,000 hectares (one million acres) for geothermal exploration and development in 1975, and figure is expected to double this year. The Energy Research and Development Administration hopes for 10-15,000 megawatts of geothermal energy by 1985, which would require, leasing over 16.3 million hectares (37 million acres) of land, at least half of which is federal land. Since there is an 8 to 8-1/2 year time laf between initial exploration and full field development, there would have to be a ten-fold increase in the amount of federal land leased within the next three years. Seventy percent of geothermal potential, 22.3 million hectares (55 million acres), is on federal lands in the west. The implication for the Service are enormous and the problems immediate. Geothermal resource are so widespread they are found to some extent in most biomes and ecosystems in the western United States. In most cases exploitation and production of geothermal resources can be made compatible with fish and wildlife management without damage, if probable impacts are clearly understood and provided for before damage has unwittingly been allowed to occur. Planning for site suitability and concern with specific operating techniques are crucial factors. There will be opportunities for enhancement: during exploration and testing many shallow groundwater bodies may be penetrated which might be developed for wildlife use. Construction equipment and materials needed for enhancement projects will be available in areas heretofore considered remote projects will be available in areas heretofore considered remote by land managers. A comprehensive knowledge of geothermal development is necessary to avoid dangers and seize opportunities. This handbook is intended to serve as a working tool in the field. It anticipated where geothermal resource development will occur in the western United States in the near future. A set of environmental assessment procedures are

  7. Geomagnetic Survey to Explore High-Temperature Geothermal System in Blawan-Ijen, East Java, Indonesia

    Directory of Open Access Journals (Sweden)

    Daud Yunus

    2018-01-01

    Full Text Available Ijen geothermal area is high-temperature geothermal system located in Bondowoso regency, East Java. It is categorized as caldera-hosted geothermal system which is covered by quaternary andesitic volcanic rocks with steep topography at the surrounding. Several surface thermal manifestations are found, such as altered rocks near Mt. Kukusan and a group of Blawan hotsprings in the northern part of the caldera. Geomagnetic survey was conducted at 72 stations which is distributed inside the caldera to delineate the existence of hydrothermal activity. Magnetic anomaly was obtained by reducing total magnetic measured on the field by IGRF and diurnal variation. Reduction to pole (RTP method was applied with geomagnetic inclination of about -32°. In general, the result shows that high magnetic anomaly is distributed at the boundary of study area, while low magnetic anomaly is observed in the centre. The low anomaly indicates demagnetized rock that probably caused by hydrothermal activity. It has a good correlation with surface alteration observed close to Mt. Kukusan as well as high temperature reservoir drilled in the centre of caldera. Accordingly, the low magnetic anomaly also presents the possibility of geothermal reservoir in Ijen geothermal area.

  8. Geomagnetic Survey to Explore High-Temperature Geothermal System in Blawan-Ijen, East Java, Indonesia

    Science.gov (United States)

    Daud, Yunus; Rosid, Syamsu; Fahmi, Fikri; Yunus, Faris Maulana; Muflihendri, Reza

    2018-02-01

    Ijen geothermal area is high-temperature geothermal system located in Bondowoso regency, East Java. It is categorized as caldera-hosted geothermal system which is covered by quaternary andesitic volcanic rocks with steep topography at the surrounding. Several surface thermal manifestations are found, such as altered rocks near Mt. Kukusan and a group of Blawan hotsprings in the northern part of the caldera. Geomagnetic survey was conducted at 72 stations which is distributed inside the caldera to delineate the existence of hydrothermal activity. Magnetic anomaly was obtained by reducing total magnetic measured on the field by IGRF and diurnal variation. Reduction to pole (RTP) method was applied with geomagnetic inclination of about -32°. In general, the result shows that high magnetic anomaly is distributed at the boundary of study area, while low magnetic anomaly is observed in the centre. The low anomaly indicates demagnetized rock that probably caused by hydrothermal activity. It has a good correlation with surface alteration observed close to Mt. Kukusan as well as high temperature reservoir drilled in the centre of caldera. Accordingly, the low magnetic anomaly also presents the possibility of geothermal reservoir in Ijen geothermal area.

  9. Recovery act. Characterizing structural controls of EGS-candidate and conventional geothermal reservoirs in the Great Basin. Developing successful exploration strategies in extended terranes

    Energy Technology Data Exchange (ETDEWEB)

    Faulds, James [Univ. of Nevada, Reno, NV (United States)

    2015-06-25

    We conducted a comprehensive analysis of the structural controls of geothermal systems within the Great Basin and adjacent regions. Our main objectives were to: 1) Produce a catalogue of favorable structural environments and models for geothermal systems. 2) Improve site-specific targeting of geothermal resources through detailed studies of representative sites, which included innovative techniques of slip tendency analysis of faults and 3D modeling. 3) Compare and contrast the structural controls and models in different tectonic settings. 4) Synthesize data and develop methodologies for enhancement of exploration strategies for conventional and EGS systems, reduction in the risk of drilling non-productive wells, and selecting the best EGS sites.

  10. Exploration for geothermal resources in the Capital District of New York. Volume 1. Final report

    Energy Technology Data Exchange (ETDEWEB)

    1981-11-01

    Water chemistry, gas analyses, and geophysical methods including gravity and magnetic surveys, microseismic monitoring, and temperature gradient measurements were used in the Capital District area to evaluate the potential for a hydrothermal geothermal system. Water and gas chemistries provided indirect indicators, and temperature gradients provided direct indications of a geothermal system. Gravity results were supportive of gradient and chemistry data, but seismic and magnetic work have thus far provided little information on the potential system. Gradients throughout the area ranged from an average background value of about 10/sup 0/C/km to a high of roughly 44/sup 0/C/km. The highest gradient values, the most unusual water chemistries and largest carbon dioxide exhalations occur along the Saratoga and McGregor faults between Saratoga Springs and Schenectady, and indicate a good potential for a usable hydrothermal geothermal system at depth.

  11. Exploration for geothermal resources in the Capital District of New York. Final report

    Energy Technology Data Exchange (ETDEWEB)

    Sneeringer, M.R.; Dunn, J.R.

    1981-11-01

    Water chemistry, gas analyses, and geophysical methods including gravity and magnetic surveys, microseismic monitoring, and temperature gradient measurements were used in the Capital District area to evaluate the potential for a hydrothermal geothermal system. Water and gas chemistries provided indirect indicators, and temperature gradients provided direct indications of a geothermal system. Gravity results were supportive of gradient and chemistry data, but seismic and magnetic work have thus far provided little information on the potential system. Gradients throughout the area ranged from an average background value of about 10/sup 0/C/km to a high of roughly 44/sup 0/C/km. The highest gradient values, the most unusual water chemistries and largest carbon dioxide exhalations occur along the Saratoga and McGregor faults between Saratoga Springs and Schenectady, and indicate a good potential for a usable hydrothermal geothermal system at depth.

  12. Exploring object-oriented technologies

    CERN Multimedia

    2000-01-01

    Object oriented technologies are the corner stone of modern software development. A piece of software is today conceived, constructed and tested as a set of objects interacting with each other, rather than as a large sequential program. OO is present throughout the whole software life cycle allowing for maintainable code re-use, clean design and manageable complexity. OO is also the seed upon which other technologies are being built and deployed, such as distributed computing, component models, open interoperability, etc.This series of three seminars will provide a pragmatic overview on the main ideas behind OO software development and will explain the inner workings of the most outstanding technologies being built on OO, such as UML, CORBA, Component Models, Agent Oriented Computing, Business Objects, etc.

  13. Exploring Hydrogen Fuel Cell Technology

    Science.gov (United States)

    Brus, David; Hotek, Doug

    2010-01-01

    One of the most significant technological issues of the 21st Century is finding a way to fulfill the energy demands without destroying the environment through global warming and climate change. Worldwide human population is on the rise, and with it, the demand for more energy in pursuit of a higher quality of life. In the meantime, as people use…

  14. Two 175 ton geothermal chiller heat pumps for leed platinum building technology demonstration project. Operation data, data collection and marketing

    Energy Technology Data Exchange (ETDEWEB)

    Kolo, Daniel [Johnson Controls, Inc., Glendale, WI (United States)

    2016-08-15

    The activities funded by this grant helped educate and inform approximately six thousand individuals who participated in guided tours of the geothermal chiller plant at Johnson Controls Corporate Headquarters in Glendale, Wisconsin over the three year term of the project. In addition to those who took the formal tour, thousands more were exposed to hands-on learning at the self-service video kiosks located in the headquarters building and augmented reality tablet app that allowed for self-guided tours. The tours, video, and app focused on the advantages of geothermal heat pump chillers, including energy savings and environmental impact. The overall tour and collateral also demonstrated the practical application of this technology and how it can be designed into a system that includes many other sustainable technologies without sacrificing comfort or health of building occupants Among tour participants were nearly 1,000 individuals, representing 130 organizations identified as potential purchasers of geothermal heat pump chillers. In addition to these commercial clients, tours were well attended by engineering, facilities, and business trade groups. This has also been a popular tour for groups from Universities around the Midwest and K-12 schools from Wisconsin and Northern Illinois A sequence of operations was put into place to control the chillers and they have been tuned and maintained to optimize the benefit from the geothermal water loop. Data on incoming and outgoing water temperature and flow from the geothermal field was logged and sent to DOE monthly during the grant period to demonstrate energy savings.

  15. Hawaii geothermal project

    Science.gov (United States)

    Kamins, R. M.

    1974-01-01

    Hawaii's Geothermal Project is investigating the occurrence of geothermal resources in the archipelago, initially on the Island of Hawaii. The state's interest in geothermal development is keen, since it is almost totally dependent on imported oil for energy. Geothermal development in Hawaii may require greater participation by the public sector than has been true in California. The initial exploration has been financed by the national, state, and county governments. Maximization of net benefits may call for multiple use of geothermal resources; the extraction of by-products and the application of treated effluents to agricultural and aquacultural uses.

  16. Salt intrusions providing a new geothermal exploration target for higher energy recovery at shallower depths

    NARCIS (Netherlands)

    Daniilidis, Alexandros; Herber, Rien

    2017-01-01

    Direct use of geothermal energy can present challenges of financial feasibility in a low-enthalpy setting. The average temperature gradients in sedimentary basins make it necessary to reach larger depths for meaningful heat production, thus increasing the drilling cost. Therefore, full realization

  17. Remote Sensing as a First Step in Geothermal Exploration in the Xilingol Volcanic Field in NE China

    Science.gov (United States)

    Peng, F.; Huang, S.; Xiong, Y.

    2013-12-01

    Geothermal energy is a renewable and low-carbon energy source independent of climate change. It is most abundant in Cenozoic volcanic areas where high temperature can be obtained within a relatively shallow depth. Geological structures play an important role in the transfer and storage of geothermal energy. Like other geological resources, geothermal resource prospecting and exploration require a good understanding of the host media. Remote sensing (RS) has the advantages of high spatial and temporal resolution and broad spatial coverage over the conventional geological and geophysical prospecting techniques, while geographical information system (GIS) has intuitive, flexible, and convenient characteristics. In this study, RS and GIS techniques are utilized to prospect the geothermal energy potential in Xilingol, a Cenozoic volcanic area in the eastern Inner Mongolia, NE China. Landsat TM/ETM+ multi-temporal images taken under clear-sky conditions, digital elevation model (DEM) data, and other auxiliary data including geological maps of 1:2,500,000 and 1:200,000 scales are used in this study. The land surface temperature (LST) of the study area is retrieved from the Landsat images with a single-channel algorithm. Prior to the LST retrieval, the imagery data are preprocessed to eliminate abnormal values by reference to the normalized difference vegetation index (NDVI) and the improved normalized water index (MNDWI) on the ENVI platform developed by ITT Visual Information Solutions. Linear and circular geological structures are then inferred through visual interpretation of the LST maps with references to the existing geological maps in conjunction with the computer automatic interpretation features such as lineament frequency, lineament density, and lineament intersection. Several useful techniques such as principal component analysis (PCA), image classification, vegetation suppression, multi-temporal comparative analysis, and 3D Surface View based on DEM data are

  18. 2012 geothermal energy congress. Proceedings

    International Nuclear Information System (INIS)

    2012-01-01

    Within the Geothermal Energy Congress 2012 from 13th to 16th November 2012, in Karlsruhe (Federal Republic of Germany), the following lectures were held: (1) Comparison of different methods for the design of geothermal probes on the example of the thermal utilization of smouldering fires at heaps (Sylvia Kuerten); (2) Determination of the thermo-physical features of loose rocks (Johannes Stegner); (3) Tools for the planning and operation of district heating grids (Werner Seichter); (4) geo:build - System optimisation of the cooling mode of the ground-source heat and cooling supply (Franziska Bockelmann); (5) Successful and economic conception, planning and optimization of district heating grids (Werner Seichter); (6) Treacer / Heat transfer decoupling in a heterogeneous hydrothermal reservoir characterized by geological faults in the Upper Rhine Graben (I. Ghergut); (7) Determination of the porosity, thermal conductivity and particle size distribution in selected sections of the Meisenheim-1 drilling core (Saar-Nahe basin, Rheinland-Palatinate) under consideration of geothermally relevant formulation of questions (Gillian Inderwies); (8) Innovative technologies of exploration in the Jemez Geothermal project, New Mexico, USA (Michael Albrecht); (9) Geothermal energy, heat pump and TABS - optimization of planning, operational control and control (Franziska Bockelmann); (10) The impact of large-scale geothermal probes (storage probes) on the heat transfer and heat loss (Christopher Steins); (11) Numeric modelling of the permocarbon in the northern Upper Rhine Graben (L. Dohrer); (12) Engineering measurement solutions on quality assurance in the exploitation of geothermal fields (C. Lehr); (13) Evaluation and optimization of official buildings with the near-surface geothermal energy for heating and cooling (Franziska Bockelmann); (14) On-site filtration for a rapid and cost-effective quantification of the particle loading in the thermal water stream (Johannes Birner

  19. The dual role of external technology sourcing in technological exploration

    DEFF Research Database (Denmark)

    Vanhaverbeke, Wim; Li-Ying, Jason; van de Vrande, Vareska

    2013-01-01

    from non-partners, partners may play a role because of whom they know. That is, they inform the firm about technological opportunities beyond its corporate venturing network. The empirical analysis supports the dual role of venturing partners in facilitating the two types of explorative learning.......We refine the concept of boundary-spanning exploration, by making a distinction between explorative learning from partners and from non-partners (Partners are organizations with whom a focal firm has some kind of external venturing relations, i.e. technological alliances, corporate venturing...... capital, or M&As). These partners play a dual role: in explorative learning from partners, a firm teams up with external venturing partners to co-develop or transfer technology. Partners’ technology base (what they know) is driving explorative learning from partners. In contrast, in explorative learning...

  20. Japanese geothermics

    International Nuclear Information System (INIS)

    Laplaige, P.

    1995-01-01

    At the end of the seventies, the NEDO (New Energy and Industrial Technology Development Organisation) and the Central Research Institute of Electric Power Industry have started two independent projects of deep geothermics research in Honshu island (Japan). The two sites are 50 km apart of each other and the boreholes have been drilled up to 2300 and 1100 m of depth, respectively, in hot-dry moderately fractured volcanic rocks. These sites are characterized by high geothermal gradients with a rock temperature reaching 250 C at the bottom of the wells. Hydraulic circulation tests are still in progress to evaluate the profitability of these sites. (J.S.). 1 fig., 1 photo

  1. A comparison of economic evaluation models as applied to geothermal energy technology

    Science.gov (United States)

    Ziman, G. M.; Rosenberg, L. S.

    1983-01-01

    Several cost estimation and financial cash flow models have been applied to a series of geothermal case studies. In order to draw conclusions about relative performance and applicability of these models to geothermal projects, the consistency of results was assessed. The model outputs of principal interest in this study were net present value, internal rate of return, or levelized breakeven price. The models used were VENVAL, a venture analysis model; the Geothermal Probabilistic Cost Model (GPC Model); the Alternative Power Systems Economic Analysis Model (APSEAM); the Geothermal Loan Guarantee Cash Flow Model (GCFM); and the GEOCOST and GEOCITY geothermal models. The case studies to which the models were applied include a geothermal reservoir at Heber, CA; a geothermal eletric power plant to be located at the Heber site; an alcohol fuels production facility to be built at Raft River, ID; and a direct-use, district heating system in Susanville, CA.

  2. Exploration Technology Program plans and directions

    Science.gov (United States)

    Aldrich, A.; Rosen, R.; Craig, M.; Mankins, J. C.

    During the first part of the next century, the United States will return to the Moon to create a permanent lunar base, and, before the year 2019, we will send a human mission to Mars. In addition to these human operations, the Space Exploration Initiative will integrally incorporate robotic lunar and Mars missions. In achieving these efforts to expand human presence and activity in space and also exerted and frontiers of human knowledge, the SEI will require an array of new technologies. Mission architecture definition is still underway, but previous studies indicate that the SEI will require developments in areas such as advanced engines for space transportation, in-space assembly and construction to support permanent basing of exploration systems in space, and advanced surface operations capabilities including adequate levels of power and surface roving vehicles, and technologies to support safely long-duration human operations in space. Plans are now being put into place to implement an Exploration Technology Program (ETP) which will develop the major technologies needed for SEI. In close coordination with other ongoing U.S. government research and development efforts, the ETP will provide in the near term clear demonstrations of potential exploration technologies, research results to support SEI architecture decisions, and a foundation of mature technology that is ready to be applied in the first round of SEI missions. In addition to the technology needed for the first round of SEI missions, the ETP will also put in place a foundation of research for longer-term technology needs—ultimately leading the human missions to Mars. The Space Exploration Initiative and the Exploration Technology Program will challenge the best and the brightest minds across government, industry and academia, inspiring students of all ages and making possible future terrestial applications of SEI technologies that may create whole new industries for the future.

  3. Geothermal Prospecting with Remote Sensing and Geographical Information System Technologies in Xilingol Volcanic Field in the Eastern Inner Mongolia, NE China

    Science.gov (United States)

    Peng, F.; Huang, S.; Xiong, Y.; Zhao, Y.; Cheng, Y.

    2013-05-01

    Geothermal energy is a renewable and low-carbon energy source independent of climate change. It is most abundant in Cenozoic volcanic areas where high temperature can be obtained within a relatively shallow depth. Like other geological resources, geothermal resource prospecting and exploration require a good understanding of the host media. Remote sensing (RS) has the advantages of high spatial and temporal resolution and broad spatial coverage over the conventional geological and geophysical prospecting, while geographical information system (GIS) has intuitive, flexible, and convenient characteristics. In this study, we apply RS and GIS technics in prospecting the geothermal energy potential in Xilingol, a Cenozoic volcanic field in the eastern Inner Mongolia, NE China. Landsat TM/ETM+ multi-temporal images taken under clear-sky conditions, digital elevation model (DEM) data, and other auxiliary data including geological maps of 1:2,500,000 and 1:200,000 scales are used in this study. The land surface temperature (LST) of the study area is retrieved from the Landsat images with the single-channel algorithm on the platform of ENVI developed by ITT Visual Information Solutions. Information of linear and circular geological structure is then extracted from the LST maps and compared to the existing geological data. Several useful technologies such as principal component analysis (PCA), vegetation suppression technique, multi-temporal comparative analysis, and 3D Surface View based on DEM data are used to further enable a better visual geologic interpretation with the Landsat imagery of Xilingol. The Preliminary results show that major faults in the study area are mainly NE and NNE oriented. Several major volcanism controlling faults and Cenozoic volcanic eruption centers have been recognized from the linear and circular structures in the remote images. Seven areas have been identified as potential targets for further prospecting geothermal energy based on the visual

  4. Michrohole Arrays Drilled with Advanced Abrasive Slurry Jet Technology to Efficiently Exploit Enhanced Geothermal Systems

    Energy Technology Data Exchange (ETDEWEB)

    Oglesby, Kenneth [Impact Technologies, Tulsa, OK (United States); Finsterle, Stefan [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Zhang, Yingqi [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Pan, Lehua [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Dobson, Parick [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Mohan, Ram [Univ. of Tulsa, OK (United States); Shoham, Ovadia [Univ. of Tulsa, OK (United States); Felber, Betty [Impact Technologies, Tulsa, OK (United States); Rychel, Dwight [Impact Technologies, Tulsa, OK (United States)

    2014-03-12

    This project had two major areas of research for Engineered/ Enhanced Geothermal System (EGS) development - 1) study the potential benefits from using microholes (i.e., bores with diameters less than 10.16 centimeters/ 4 inches) and 2) study FLASH ASJ to drill/ install those microbores between a well and a fracture system. This included the methods and benefits of drilling vertical microholes for exploring the EGS reservoir and for installing multiple (forming an array of) laterals/ directional microholes for creating the in-reservoir heat exchange flow paths. Significant benefit was found in utilizing small microbore sized connecting bores for EGS efficiency and project life. FLASH ASJ was deemed too complicated to optimally work in such deep reservoirs at this time.

  5. Fiscal 1997 report on the verification survey of geothermal exploration technology. 2. Development of the reservoir variation survey method (development of the gravity survey method); 1997 nendo chinetsu tansa gijutsu nado kensho chosa. Choryuso hendo tansaho kaihatsu (juryoku tansaho kaihatsu) hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    Among technology developments such as the reservoir evaluation at initial developmental stage and stabilization/maintenance of power after the start of operation, the fiscal 1997 result was described of the development of the gravity survey method. The paper conducted the installation of gravity measuring points outside the existing monitoring range, introduction of CG-3M gravimeter/GPS measuring system, drilling of ground water level monitoring well, etc. for the setup of a system for new gravity monitoring. Moreover, regular measurement of gravity was made for the first fiscal year, and at the same time the continued observation of ground water level, precipitation, atmospheric pressure, and temperature was started. It is necessary to study the effects on gravity variation such as gravity gradient and tidal correction. Conducted were collection/arrangement of the existing data and database construction for history matching/variation prediction in the Yanaizu Nishiyama area. The paper made surveys of the trends/literature. In the future, needed are the computation using density models of geothermal reservoirs and test use of EDCON`s downhole gravimeter. 44 refs., 30 figs., 17 tabs.

  6. Geological and hydrogeochemical explorations for geothermal resources in eastern Sabalan, NW Iran.

    Science.gov (United States)

    Masoumi, Roohangiz

    2017-04-01

    Geological considerations in the east of Sabalan volcano indicate that the calc-alkaline volcanic-sedimentary units constitute the great volume of the geothermal reservoir in the study district. The rocks suffered argillic alteration acted as cap rocks for this reservoir. In some localities in the study district siliceous (chalcedony and opal) sinters were developed around the orifice of the hot springs. The geothermal fluids in the study district, in terms of physico-chemical parameters, have characteristics which differ from other geothermal fields around the Mount Sabalan particularly in the southern and northwestern districts. These differences are: (a) the measured pH values of the geothermal fluids range from approximately 4.5 to 8.8 signifying a variation from acidity to alkalinity; (b) the measured TDS values of these waters, in comparison with the average TDS values for most types of geothermal systems, are low and the minimum values were recorded in the Viladara area; (c) estimation of concentration values of anions and cations in the selected spring water samples indicate that they have chiefly chloride and bicarbonate anions however, samples from the Sardabeh area contain relatively high sulfate (SO42-) content. The concentration values of rare elements in these waters are noticeable. Selenium has the highest concentration value (170 mg/l) among the rare elements. The maximum concentration values of boron and arsenic were measured to be 7 mg/l and 10 mg/l, respectively. The rest of rare elements have relatively low concentration values in the studied samples. The calculation of solute-based geothermometry was done on the basis of Na-Li, Na-K, Na-K, Ca, and silica for the water samples. The results of all these procedures for estimation of temperature of the geothermal reservoir in the east of Mount Sabalan were relatively very close to one another. Nevertheless, the temperatures determined by the Na-Li and Na-K geothermometric methods are 225°C and 239

  7. A regional strategy for geothermal exploration with emphasis on gravity and magnetotellurics

    International Nuclear Information System (INIS)

    Aiken, C.L.V.; Ander, M.E.; Los Alamos Scientific Lab., NM

    1981-01-01

    Part of the resource evaluationProgram conducted by Los Alamos Scientific Laboratory for the national Hot Dry Rock (HDR) Geothermal Program, a regional magnetotelluric (MT) survey of New Mexico and Arizona is being performed. The MT lines are being located in areas where the results of anaylsis of residual gravity anomaly maps of Arizona and New Mexico, integrated with other geologic and geophysical studies indicate the greatest potential for HDR resources. (orig./ME)

  8. Advanced Heat/Mass Exchanger Technology for Geothermal and Solar Renewable Energy Systems

    Energy Technology Data Exchange (ETDEWEB)

    Greiner, Miles [Univ. of Nevada, Reno, NV (United States); Childress, Amy [Univ. of Nevada, Reno, NV (United States); Hiibel, Sage [Univ. of Nevada, Reno, NV (United States); Kim, Kwang [Univ. of Nevada, Reno, NV (United States); Park, Chanwoo [Univ. of Nevada, Reno, NV (United States); Wirtz, Richard [Univ. of Nevada, Reno, NV (United States)

    2014-12-16

    Northern Nevada has abundant geothermal and solar energy resources, and these renewable energy sources provide an ample opportunity to produce economically viable power. Heat/mass exchangers are essential components to any energy conversion system. Improvements in the heat/mass exchange process will lead to smaller, less costly (more efficient) systems. There is an emerging heat transfer technology, based on micro/nano/molecular-scale surface science that can be applied to heat/mass exchanger design. The objective is to develop and characterize unique coating materials, surface configurations and membranes capable of accommodating a 10-fold increase in heat/mass exchanger performance via phase change processes (boiling, condensation, etc.) and single phase convective heat/mass transfer.

  9. Application of helium isotopes in shallow groundwaters for geothermal energy exploration in the Upper Rhine Graben

    International Nuclear Information System (INIS)

    Freundt, Florian

    2017-01-01

    The helium isotope system is an established tool in hydrology for identifying mantle fluids in deep aquifers. This study applies the helium tracer system for the first time in shallow, unconfined aquifers of the Upper Rhine Graben. The Graben is a part of the Cenozoic Rift system of Western and Central Europe, a continental rift zone with unusually high geothermal gradients, making it an ideal region of Germany for geothermal energy development. The aim of this study is to develop a suite of natural groundwater tracers able to achieve a cost and effort reduction in geothermal prospection. The 3 He/ 4 He-ratio is therefore applied, as part of a multi-tracer approach including 3 H, δ 18 O, δ 2 H, δ 13 C, 14 C and 222 Rn, to identify and locate fault zones with suitable permeabilities for power plant operation. Three target areas along the graben were studied, each located on one of the main fault lines. A mantle-derived helium signature could be identified and separated from tritiogenic helium in a shallow aquifer in the north-west of the Graben. The mixing component of mantle-derived fluid in the shallow groundwater is calculated to reach up to 5%, based on the analysis of the 3 He/ 4 He isotope system. The employed method proves that the local permeability of the fault zone is high. The origin of the locally occurring upwelling of salinated water can be redetermined by the data.

  10. The geothermal power organization

    Energy Technology Data Exchange (ETDEWEB)

    Scholl, K.L. [National Renewable Energy Lab., Golden, CO (United States)

    1997-12-31

    The Geothermal Power Organization is an industry-led advisory group organized to advance the state-of-the-art in geothermal energy conversion technologies. Its goal is to generate electricity from geothermal fluids in the most cost-effective, safe, and environmentally benign manner possible. The group achieves this goal by determining the Member`s interest in potential solutions to technological problems, advising the research and development community of the needs of the geothermal energy conversion industry, and communicating research and development results among its Members. With the creation and adoption of a new charter, the Geothermal Power Organization will now assist the industry in pursuing cost-shared research and development projects with the DOE`s Office of Geothermal Technologies.

  11. Federal Geothermal Research Program Update Fiscal Year 2000

    Energy Technology Data Exchange (ETDEWEB)

    Renner, J.L.

    2001-08-15

    The Department of Energy's Geothermal Program serves two broad purposes: (1) to assist industry in overcoming near-term barriers by conducting cost-shared research and field verification that allows geothermal energy to compete in today's aggressive energy markets; and (2) to undertake fundamental research with potentially large economic payoffs. The four categories of work used to distinguish the research activities of the Geothermal Program during FY 2000 reflect the main components of real-world geothermal projects. These categories form the main sections of the project descriptions in this Research Update. Exploration Technology research focuses on developing instruments and techniques to discover hidden hydrothermal systems and to explore the deep portions of known systems. Research in geophysical and geochemical methods is expected to yield increased knowledge of hidden geothermal systems. Reservoir Technology research combines laboratory and analytical investigations with equipment development and field testing to establish practical tools for resource development and management for both hydrothermal reservoirs and enhanced geothermal systems. Research in various reservoir analysis techniques is generating a wide range of information that facilitates development of improved reservoir management tools. Drilling Technology focuses on developing improved, economic drilling and completion technology for geothermal wells. Ongoing research to avert lost circulation episodes in geothermal drilling is yielding positive results. Conversion Technology research focuses on reducing costs and improving binary conversion cycle efficiency, to permit greater use of the more abundant moderate-temperature geothermal resource, and on the development of materials that will improve the operating characteristics of many types of geothermal energy equipment. Increased output and improved performance of binary cycles will result from investigations in heat cycle research.

  12. Federal Geothermal Research Program Update Fiscal Year 2000; ANNUAL

    International Nuclear Information System (INIS)

    Renner, J.L.

    2001-01-01

    The Department of Energy's Geothermal Program serves two broad purposes: (1) to assist industry in overcoming near-term barriers by conducting cost-shared research and field verification that allows geothermal energy to compete in today's aggressive energy markets; and (2) to undertake fundamental research with potentially large economic payoffs. The four categories of work used to distinguish the research activities of the Geothermal Program during FY 2000 reflect the main components of real-world geothermal projects. These categories form the main sections of the project descriptions in this Research Update. Exploration Technology research focuses on developing instruments and techniques to discover hidden hydrothermal systems and to explore the deep portions of known systems. Research in geophysical and geochemical methods is expected to yield increased knowledge of hidden geothermal systems. Reservoir Technology research combines laboratory and analytical investigations with equipment development and field testing to establish practical tools for resource development and management for both hydrothermal reservoirs and enhanced geothermal systems. Research in various reservoir analysis techniques is generating a wide range of information that facilitates development of improved reservoir management tools. Drilling Technology focuses on developing improved, economic drilling and completion technology for geothermal wells. Ongoing research to avert lost circulation episodes in geothermal drilling is yielding positive results. Conversion Technology research focuses on reducing costs and improving binary conversion cycle efficiency, to permit greater use of the more abundant moderate-temperature geothermal resource, and on the development of materials that will improve the operating characteristics of many types of geothermal energy equipment. Increased output and improved performance of binary cycles will result from investigations in heat cycle research

  13. Fiscal 1999 research and verification of geothermal energy exploring technologies and the like. Development of reservoir mass and heat flow characterization (Electrical and electromagnetic monitoring technology - Summary); 1999 nendo chinetsu tansa gijutsu nado kensho chosa hokokusho (yoyaku). Choryuso hendo tansaho kaihatsu (denki denjiki tansaho kaihatsu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    Facilities for monitoring self-potential and resistivity are installed in the Ogiri district, Kagoshima Prefecture, where the Ogiri geothermal power plant is situated, and studies are made about relations between hot water production/reinjection and potential/resistivity at the power plant for the development of a high-performance numerical simulation system for the reservoir. The activities cover the development of (1) a self-potential monitoring system, (2) the development of a resistivity monitoring system, and (3) the development of a reservoir change prediction technique using self-potential and resistivity. Under item (1), eight self-potential monitoring stations are newly installed for the monitoring effort to continue now at a total of 50 stations. Potential has risen by 20 mV in two years since the drilling of a production replenishment well in February of 1999, with the domain of change in potential also expanding. Under item (2), the 3D MT (3-dimensional magnetotelluric) technique is used for resistivity profile investigation at 80 monitoring stations and preliminary monitoring tests are conducted to deliberate positions for resistivity monitoring. Under item (3), tracer tests are conducted for constructing a high-precision reservoir model for predicting changes in temperature, etc., attributable to the return of reinjected hot water, and a natural state reservoir simulation model is fabricated. (NEDO)

  14. ThermoGIS - An integrated web-based information system for geothermal exploration and governmental decision support for M

    NARCIS (Netherlands)

    Kramers, L.; Wees, J.D.A.M. van; Mijnlieff, H.F.; Kronimus, R.A.

    2010-01-01

    The use of geothermal energy through implementation of low enthalpy geothermal production systems for both electricity and heating has been growing rapidly in Europe. Geothermal activities can take considerable advantage of a wealth of existing oil and gas data. It is a major challenge to put this

  15. Application of helium isotopes in shallow groundwaters for geothermal energy exploration in the Upper Rhine Graben

    Energy Technology Data Exchange (ETDEWEB)

    Freundt, Florian

    2017-07-12

    The helium isotope system is an established tool in hydrology for identifying mantle fluids in deep aquifers. This study applies the helium tracer system for the first time in shallow, unconfined aquifers of the Upper Rhine Graben. The Graben is a part of the Cenozoic Rift system of Western and Central Europe, a continental rift zone with unusually high geothermal gradients, making it an ideal region of Germany for geothermal energy development. The aim of this study is to develop a suite of natural groundwater tracers able to achieve a cost and effort reduction in geothermal prospection. The {sup 3}He/{sup 4}He-ratio is therefore applied, as part of a multi-tracer approach including {sup 3}H, δ{sup 18}O, δ{sup 2}H, δ{sup 13}C, {sup 14}C and {sup 222}Rn, to identify and locate fault zones with suitable permeabilities for power plant operation. Three target areas along the graben were studied, each located on one of the main fault lines. A mantle-derived helium signature could be identified and separated from tritiogenic helium in a shallow aquifer in the north-west of the Graben. The mixing component of mantle-derived fluid in the shallow groundwater is calculated to reach up to 5%, based on the analysis of the {sup 3}He/{sup 4}He isotope system. The employed method proves that the local permeability of the fault zone is high. The origin of the locally occurring upwelling of salinated water can be redetermined by the data.

  16. Technology transfer from the space exploration initiative

    International Nuclear Information System (INIS)

    Buden, D.

    1991-01-01

    Space exploration has demonstrated that it stimulates the national economy by creating new and improved products, increased employment, and provides a stimulus to education. The exploration of the Moon and Mars under the Space Exploration Initiative has the potential of accelerating this stimulates to the economy. It is difficult to identify all of the concrete ways this will be accomplished. However, many areas can be identified. The space exploration building blocks of power, propulsion, spacecraft, robotics, rovers, mining and manufacturing, communications, navigation, habitats, life support and infrastructures are reviewed to identify possible technology areas. For example, better means for working in hazardous areas and handling hazardous waste are potential outcomes of this initiative. Methods to produce higher quality goods and improve America's competitiveness in manufacturing will undoubtedly evolve from the need to produce products that must last many years in the harsh environments of space and planetary surfaces. Some ideas for technology transfer are covered in this paper

  17. National Deployment of Domestic Geothermal Heat Pump Technology: Observations on the UK Experience 1995–2013

    Directory of Open Access Journals (Sweden)

    Simon Rees

    2014-08-01

    Full Text Available Uptake of geothermal heat pump technology in the UK and corresponding development of a domestic installation industry has progressed significantly in the last decade. This paper summarizes the growth process and reviews the research that has been specifically concerned with conditions in the UK. We discuss the driving forces behind these developments and some of the supporting policy initiatives that have been implemented. Publically funded national trials were completed to assess the performance and acceptance of the technology and validate design and installation standards. We comment on both the technical and non-technical findings of the trials and the related academic research and their relevance to standards development. A number of technical issues can be identified—some of which may be particular to the UK—and we suggest a number of research and development questions that need to be addressed further. Current national support for the technology relies solely on a tariff mechanism and it is uncertain that this will be effective enough to ensure sufficient growth to meet the national renewable heat target in 2020. A broader package of support that includes mandatory measures applied to future housing development and retrofit may be necessary to ensure long-term plans for national deployment and decarbonization of heat are achieved. Industry needs to demonstrate that efficiency standards can be assured, capital costs reduced in the medium-term and that national training schemes are effective.

  18. Exploring the Gross Schoenebeck (Germany) geothermal site using a statistical joint interpretation of magnetotelluric and seismic tomography models

    Energy Technology Data Exchange (ETDEWEB)

    Munoz, Gerard; Bauer, Klaus; Moeck, Inga; Schulze, Albrecht; Ritter, Oliver [Deutsches GeoForschungsZentrum (GFZ), Telegrafenberg, 14473 Potsdam (Germany)

    2010-03-15

    Exploration for geothermal resources is often challenging because there are no geophysical techniques that provide direct images of the parameters of interest, such as porosity, permeability and fluid content. Magnetotelluric (MT) and seismic tomography methods yield information about subsurface distribution of resistivity and seismic velocity on similar scales and resolution. The lack of a fundamental law linking the two parameters, however, has limited joint interpretation to a qualitative analysis. By using a statistical approach in which the resistivity and velocity models are investigated in the joint parameter space, we are able to identify regions of high correlation and map these classes (or structures) back onto the spatial domain. This technique, applied to a seismic tomography-MT profile in the area of the Gross Schoenebeck geothermal site, allows us to identify a number of classes in accordance with the local geology. In particular, a high-velocity, low-resistivity class is interpreted as related to areas with thinner layers of evaporites; regions where these sedimentary layers are highly fractured may be of higher permeability. (author)

  19. Deep geothermics

    International Nuclear Information System (INIS)

    Anon.

    1995-01-01

    The hot-dry-rocks located at 3-4 km of depth correspond to low permeable rocks carrying a large amount of heat. The extraction of this heat usually requires artificial hydraulic fracturing of the rock to increase its permeability before water injection. Hot-dry-rocks geothermics or deep geothermics is not today a commercial channel but only a scientific and technological research field. The Soultz-sous-Forets site (Northern Alsace, France) is characterized by a 6 degrees per meter geothermal gradient and is used as a natural laboratory for deep geothermal and geological studies in the framework of a European research program. Two boreholes have been drilled up to 3600 m of depth in the highly-fractured granite massif beneath the site. The aim is to create a deep heat exchanger using only the natural fracturing for water transfer. A consortium of german, french and italian industrial companies (Pfalzwerke, Badenwerk, EdF and Enel) has been created for a more active participation to the pilot phase. (J.S.). 1 fig., 2 photos

  20. MeProRisk - a toolbox for evaluating risks in exploration, development, and operation of geothermal reservoirs

    Science.gov (United States)

    Clauser, C.

    2009-04-01

    When developing geothermal resources, the risk of failure is still high when compared to hydrocarbon exploration. The MeProRisk projects aims at the improvement of strategies in all phases of the reservoir life cycle. It is a joint enterprise of five university institutes at RWTH Aachen University, Free University Berlin, and Kiel University. Two partners, namely Geophysica Beratunggesellschaft mbH, (Aachen), and RWE Dea AG (Hamburg) present the industrial side. It is funded by the German Ministry of Education and Science (BMBF). The key idea followed in this project is that the development of the understanding of a given reservoir is an iterative process. Starting from geological base knowledge and geophysical exploration one or more conceptual models will emerge, which will be incorporated in first numerical models. The use of inverse techniques in a broad sense will not only lead to an optimal model, but will produce uncertainty and resolution estimates for this model. This information may be used for further setup of optimal experiments, including the choice of exploration well locations. In later stages of reservoir development, the numerical models will be continuously updated based on the most recent models. Once wells have been drilled, the character of experiments shifts from static methods to dynamic interaction with the reservoir, e.g. by injection experiments and their monitoring. The use of all the methods with one simulation tool poses large challenges. Inverse problems require orders of magnitude larger computer resources, and the development of appropriate theoretical and numerical methods for this is on of the primary aims of this project. Due to the less obvious signatures of geothermally relevant targets, it is also necessary to improve the experimental base for model setup and update by developing new and better methods for some of the key problems in the case of geothermal targets. Among these are the development of methods to estimate

  1. Exploring the Market for Breakthrough Technologies

    NARCIS (Netherlands)

    Ortt, J. Roland; Langley, David J.; Pals, Nico

    In this article, the gap between futures research (long term) and market research (short term) is closed in two ways. Firstly, by describing methods of market exploration that can be used earlier on in the process of development and diffusion of breakthrough technologies, so market research can be

  2. Exploring the Market for Breakthrough Technologies

    NARCIS (Netherlands)

    Ortt, J. Roland; Langley, David J.; Pals, Nico

    2007-01-01

    In this article, the gap between futures research (long term) and market research (short term) is closed in two ways. Firstly, by describing methods of market exploration that can be used earlier on in the process of development and diffusion of breakthrough technologies, so market research can be

  3. Exploring novel food proteins and processing technologies

    NARCIS (Netherlands)

    Avila Ruiz, Geraldine

    2016-01-01

    Foods rich in protein are nowadays high in demand worldwide. To ensure a sustainable supply and a high quality of protein foods, novel food proteins and processing technologies need to be explored to understand whether they can be used for the development of high-quality protein foods. Therefore,

  4. Exploration Mission Benefits From Logistics Reduction Technologies

    Science.gov (United States)

    Broyan, James Lee, Jr.; Schlesinger, Thilini; Ewert, Michael K.

    2016-01-01

    Technologies that reduce logistical mass, volume, and the crew time dedicated to logistics management become more important as exploration missions extend further from the Earth. Even modest reductions in logical mass can have a significant impact because it also reduces the packing burden. NASA's Advanced Exploration Systems' Logistics Reduction Project is developing technologies that can directly reduce the mass and volume of crew clothing and metabolic waste collection. Also, cargo bags have been developed that can be reconfigured for crew outfitting and trash processing technologies to increase habitable volume and improve protection against solar storm events are under development. Additionally, Mars class missions are sufficiently distant that even logistics management without resupply can be problematic due to the communication time delay with Earth. Although exploration vehicles are launched with all consumables and logistics in a defined configuration, the configuration continually changes as the mission progresses. Traditionally significant ground and crew time has been required to understand the evolving configuration and locate misplaced items. For key mission events and unplanned contingencies, the crew will not be able to rely on the ground for logistics localization assistance. NASA has been developing a radio frequency identification autonomous logistics management system to reduce crew time for general inventory and enable greater crew self-response to unplanned events when a wide range of items may need to be located in a very short time period. This paper provides a status of the technologies being developed and there mission benefits for exploration missions.

  5. Mobile Haptic Technology Development through Artistic Exploration

    DEFF Research Database (Denmark)

    Cuartielles, David; Göransson, Andreas; Olsson, Tony

    2012-01-01

    This paper investigates how artistic explorations can be useful for the development of mobile haptic technology. It presents an alternative framework of design for wearable haptics that contributes to the building of haptic communities outside specialized research contexts. The paper also present...

  6. Technology Applications that Support Space Exploration

    Science.gov (United States)

    Henderson, Edward M.; Holderman, Mark L.

    2011-01-01

    Several enabling technologies have been identified that would provide significant benefits for future space exploration. In-Space demonstrations should be chosen so that these technologies will have a timely opportunity to improve efficiencies and reduce risks for future spaceflight. An early window exists to conduct ground and flight demonstrations that make use of existing assets that were developed for the Space Shuttle and the Constellation programs. The work could be mostly performed using residual program civil servants, existing facilities and current commercial launch capabilities. Partnering these abilities with the emerging commercial sector, along with other government agencies, academia and with international partners would provide an affordable and timely approach to get the launch costs down for these payloads, while increasing the derived benefits to a larger community. There is a wide scope of varied technologies that are being considered to help future space exploration. However, the cost and schedule would be prohibitive to demonstrate all these in the near term. Determining which technologies would yield the best return in meeting our future space needs is critical to building an achievable Space Architecture that allows exploration beyond Low Earth Orbit. The best mix of technologies is clearly to be based on our future needs, but also must take into account the availability of existing assets and supporting partners. Selecting those technologies that have complimentary applications will provide the most knowledge, with reasonable cost, for future use The plan is to develop those applications that not only mature the technology but actually perform a useful task or mission. These might include such functions as satellite servicing, a propulsion stage, processing lunar regolith, generating and transmitting solar power, cryogenic fluid transfer and storage and artificial gravity. Applications have been selected for assessment for future

  7. Remote Sensing Techniques as a Tool for Geothermal Exploration: the Case Study of Blawan Ijen, East Java

    Science.gov (United States)

    Pasqua, Claudio; Verdoya, Massimo

    2014-05-01

    The use of remote sensing techniques in the initial phase of geothermal surveys represents a very cost-effective tool, which can contribute to a successful exploration program. Remote sensing allows the analysis of large surfaces and can lead to a significant improvement of the identification of surface thermal anomalies, through the use of thermal infra red data (TIR), as well as of zones of widespread and recent faulting, which can reflect larger permeability of geological formations. Generally, the fractures analysis from remote sensing can be fundamental to clarify the structural setting of an area. In a regional volcanic framework, it can also help in defining the spatial and time evolution of the different volcanic apparatuses. This paper describes the main results of a remote sensing study, conducted in the Blawan-Ijen volcanic area (East Java), which is at present subject of geothermal exploration. This area is characterized by the presence of a 15 km wide caldera originated by a collapsed strato volcano. This event was followed by the emplacement of several peri-calderic and intra-calderic volcanoes, among which G. Raung, as testified by the frequent occurrence of shallow earthquakes and by H2S emission and sulfur deposition, and G. Kawah Ijen, occurring at the eastern rim of the caldera, are still active. The summit of G. Kawah Ijen volcano consists of two interlocking craters forming an E-W elongated depression filled up by a hyperacidic lake. Along the southern shore of the lake, a small rhyolitic dome occurs, which exhibits strong fumarolic activity with temperature of as much as 600 °C. We performed an analysis based on the combined interpretation of Landsat ETM+7, Aster and Synthetic Aperture Radar (SAR) images, focused on the identification of subsurface high permeability zones. The main trends of the linear features as derived from the fractures analysis, as well as their relation with the distribution of volcanic centres, were identified

  8. Multi-disciplinary study for the exploration of deep low enthalpy geothermal reservoirs, Neuchâtel, Switzerland

    Science.gov (United States)

    Mauri, G.; Abdelfettah, Y.; Negro, F.; Schill, E.; Vuataz, F.

    2011-12-01

    The authorities of the canton of Neuchâtel, in the Western part of Switzerland, are willing to develop geothermal energy for district heating in the two main cities of the canton: Neuchâtel, located along the Lake of Neuchâtel, and La Chaux-de-Fonds situated in a high valley of the Jura Massif. The geology of both areas is linked to the Jura Range and present complex structures, where the landscape is composed of anticlines associated with overthrust faults, which are overcut by strike-slip fault and secondary faulting events. The rock formations go from the Trias, which forms the detachment layer, up to the Quaternary rock. Bedrocks are mainly composed of limestones and marls, which can reach a thickness of several hundreds meters. The three main deep aquifers investigated in this area, from the shallowest (≤ 400 m below surface) to deepest (geological models and 3D gravimetry models to best characterize the underground structures and to find areas where the rock properties would be favourable to geothermal exploitation. This means targets where permeability and porosity are high in the potential aquifers, allowing a significant flow at the future production wells. The results indicate that gravity anomalies are associated with both shallow and deep geological structures in the two exploration sites and that high resolution of dense grid gravity measurements combined with realistic 3D models of the geological structures allow to characterize interesting features for deep geothermal exploration. Gravity corrections were carried out with a computing code using different DEM resolution ranging from a very high resolution (0.5 m pixel in the vicinity of each station) toward a lower resolution (25 m for the distal areas as far as 110 km away from each station). The bathymetry of the Lake of Neuchâtel (218 km2) has been used to correct gravity effects from the large volume of water along the Lake shore of Neuchâtel. The combination of 3D geological models with a

  9. Geothermal energy worldwide

    International Nuclear Information System (INIS)

    Barbier, Enriko

    1997-01-01

    Geothermal energy, as a natural steam and hot water, has been exploited for decades in order to generate electricity as well as district heating and industrial processes. The present geothermal electrical installed capacity in the world is about 10.000 MWe and the thermal capacity in non-electrical uses is about 8.200 MWt. Electricity is produced with an efficiency of 10-17%, and the cost of the kWh is competitive with conventional energy sources. In the developing countries, where a total installed electrical power is still low, geothermal energy can play a significant role: in El Salvador, for example, 25% of electricity comes from geothermal spring, 20% in the Philippines and 8% in Kenya. Present technology makes it possible to control the environmental impact of geothermal exploitation. Geothermal energy could also be extracted from deep geopressured reservoirs in large sedimentary basins, hot dry rock systems and magma bodies. (author)

  10. Logistics Reduction Technologies for Exploration Missions

    Science.gov (United States)

    Broyan, James L., Jr.; Ewert, Michael K.; Fink, Patrick W.

    2014-01-01

    Human exploration missions under study are limited by the launch mass capacity of existing and planned launch vehicles. The logistical mass of crew items is typically considered separate from the vehicle structure, habitat outfitting, and life support systems. Although mass is typically the focus of exploration missions, due to its strong impact on launch vehicle and habitable volume for the crew, logistics volume also needs to be considered. NASA's Advanced Exploration Systems (AES) Logistics Reduction and Repurposing (LRR) Project is developing six logistics technologies guided by a systems engineering cradle-to-grave approach to enable after-use crew items to augment vehicle systems. Specifically, AES LRR is investigating the direct reduction of clothing mass, the repurposing of logistical packaging, the use of autonomous logistics management technologies, the processing of spent crew items to benefit radiation shielding and water recovery, and the conversion of trash to propulsion gases. Reduction of mass has a corresponding and significant impact to logistical volume. The reduction of logistical volume can reduce the overall pressurized vehicle mass directly, or indirectly benefit the mission by allowing for an increase in habitable volume during the mission. The systematic implementation of these types of technologies will increase launch mass efficiency by enabling items to be used for secondary purposes and improve the habitability of the vehicle as mission durations increase. Early studies have shown that the use of advanced logistics technologies can save approximately 20 m(sup 3) of volume during transit alone for a six-person Mars conjunction class mission.

  11. Application of telluric-telluric profiling combined with magnetotelluric and self-potential methods to geothermal exploration in the Fujian Province, China

    Science.gov (United States)

    Pham, Van-Ngoc; Boyer, Danièle; Yuan, Xue Cheng; Liu, Shao Cheng

    1995-05-01

    In the Fujian Province, southeastern China, most of the hot springs emerge in fluviatile valleys and the geothermal resources are mainly medium and low temperature ones by mixing of hot water with cold superficial groundwater. The occurrence of the thermal waters is controlled by deep tectonic fractures in the bedrock where higher-temperature geothermal reservoirs of economic interest are present. The objective of this study is to detect the deeper active hydrothermal zone under a thick sedimentary cover by geoelectrical methods. In the Gui-An site, the combination of telluric-telluric profiling and magnetotelluric methods turns out very efficient to delineate more accurately the width of the deep conductive fracture zone. Moreover, the self-potential method allows us to localize the most active geothermal zone by electrofiltration processes above a convective cell of hot water which flows up from a deep source. The combined results constitute a possible guide for deep geothermal exploration currently encountered in several geothermal regions over the world.

  12. Geothermal Energy Program overview

    International Nuclear Information System (INIS)

    1991-12-01

    The mission of the Geothermal Energy Program is to develop the science and technology necessary for tapping our nation's tremendous heat energy sources contained with the Earth. Geothermal energy is a domestic energy source that can produce clean, reliable, cost- effective heat and electricity for our nation's energy needs. Geothermal energy -- the heat of the Earth -- is one of our nation's most abundant energy resources. In fact, geothermal energy represents nearly 40% of the total US energy resource base and already provides an important contribution to our nation's energy needs. Geothermal energy systems can provide clean, reliable, cost-effective energy for our nation's industries, businesses, and homes in the form of heat and electricity. The US Department of Energy's (DOE) Geothermal Energy Program sponsors research aimed at developing the science and technology necessary for utilizing this resource more fully. Geothermal energy originates from the Earth's interior. The hottest fluids and rocks at accessible depths are associated with recent volcanic activity in the western states. In some places, heat comes to the surface as natural hot water or steam, which have been used since prehistoric times for cooking and bathing. Today, wells convey the heat from deep in the Earth to electric generators, factories, farms, and homes. The competitiveness of power generation with lower quality hydrothermal fluids, geopressured brines, hot dry rock, and magma ( the four types of geothermal energy) still depends on the technical advancements sought by DOE's Geothermal Energy Program

  13. Geothermal energy

    International Nuclear Information System (INIS)

    Rummel, F.; Kappelmeyer, O.; Herde, O.A.

    1992-01-01

    Objective of this brochure is to present the subject Geothermics and the possible use of geothermal energy to the public. The following aspects will be refered to: -present energy situation -geothermal potential -use of geothermal energy -environemental aspects -economics. In addition, it presents an up-dated overview of geothermal projects funded by the German government, and a list of institutions and companies active in geothermal research and developments. (orig./HP) [de

  14. FY 2001 report on the results of the development of the hydrothermal utilization power plant, etc. Development of collecting technology for deep geothermal resources (Development of production technology for deep geothermal resources); 1992 - 2001 nessui riyo hatsuden plant tou kaihatsu sokatsu seika hokokusho. Shinbu chinetsu shigen saishu gijutsu no kaihatsu - Shinbu chinetsu shigen seisan gijutsu no kaihatsu (2001 nendo seika hokokusho bessatsu shiryo)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-03-01

    For making effective/economical collection of deep geothermal resources, development was made from FY 1991 to FY 2001 of the 'drilling technology for deep geothermal resources' and 'production technology for deep geothermal resources,' and the results were summarized. As to the development of logging technology, the PTSD logging system was developed which can measure temperature/pressure/flow velocity/fluid density in geothermal well under the environment of temperature of 400 degrees C. Concerning the development of monitoring technology, development was made of the PT monitoring system that can make the long-term continuous measuring of temperature/pressure in deep geothermal observation well under the environment of temperature of 400 degrees C and of the C monitoring system that samples geothermal fluids at regular intervals to grasp changes in chemical component. Relating to the development of high temperature tracer monitoring technology, the following were conducted: extraction of high temperature tracer agent that can be used in geothermal reservoirs under the environment of temperature of 300 degrees C, development of simulator, and establishment of how to put tracer agent into the reservoir and how to analyze tracer agent. Further, the R and D were made of scale monitoring technology and scale prevention/removal technology. (NEDO)

  15. Prospects of geothermal energy

    International Nuclear Information System (INIS)

    Manzella, A.; Bianchi, A.

    2008-01-01

    Geothermal energy has great potential as a renewable energy with low environmental impact, the use of heat pumps is becoming established in Italy but the national contributions are still modest when compared to other nations. Mature technologies could double the installed geothermal power in Italy at 2020. [it

  16. Accelerating Geothermal Research (Fact Sheet)

    Energy Technology Data Exchange (ETDEWEB)

    2014-05-01

    Geothermal research at the National Renewable Energy Laboratory (NREL) is advancing geothermal technologies to increase renewable power production. Continuous and not dependent on weather, the geothermal resource has the potential to jump to more than 500 gigawatts in electricity production, which is equivalent to roughly half of the current U.S. capacity. Enhanced geothermal systems have a broad regional distribution in the United States, allowing the potential for development in many locations across the country.

  17. Outline of geothermal energy research and development in fiscal 1999; Heisei 11 nendo chinetsu enerugi kenkyu kaihatsu no gaiyo

    Energy Technology Data Exchange (ETDEWEB)

    Konishi, T. [Agency of Industrial Science and Tehcnology, Tokyo (Japan)

    1999-11-18

    In this paper, the outline of the budget of geothermal energy relation in fiscal 1999, the system of research and development and the outline of research and development are described. Budgets in fiscal 1999 are the general account 17 million yen, the power development special account 3,222 million yen, sum total 323,900 million yen and it is a 33 million yen decrease compared with the preceding year. Within research and development, the following are included as a survey investigation research; a geothermal energy survey and picking technology, a verification investigation of a geothermal energy exploration technique, a deep geothermal resource investigation and an analysis and evaluation therefor. As a development of geothermal energy power plants using hot water, the following are included; development of the 10 MW binary cycle power generation plant, development of the bottom hole information system (MWD) in geothermal well drilling, technology development of the geothermal hot dry rock source system. As an analysis and evaluation of the bottom hole information detection system in geothermal well drilling, the following are included; an analysis and evaluation of the hot dry rock thermal extraction system, an analysis and evaluation of the deep geothermal resources picking technology, an analysis and evaluation of metallic materials for the geothermal deep direction and an analysis and evaluation of high polymer materials for the geothermal deep direction. (NEDO)

  18. Nuclear technologies for Moon and Mars exploration

    International Nuclear Information System (INIS)

    Buden, D.

    1991-01-01

    Nuclear technologies are essential to successful Moon and Mars exploration and settlements. Applications can take the form of nuclear propulsion for transport of crews and cargo to Mars and the Moon; surface power for habitats and base power; power for human spacecraft to Mars; shielding and life science understanding for protection against natural solar and cosmic radiations; radioisotopes for sterilization, medicine, testing, and power; and resources for the benefits of Earth. 5 refs., 9 figs., 3 tabs

  19. Fiscal 1999 research and verification of geothermal energy exploring technologies and the like. Development of reservoir mass and heat flow characterization (Development of reservoir change prediction technology - Summary); 1999 nendo chinetsu tansa gijutsu nado kensho chosa hokokusho (yoyaku). Choryuso hendo tansaho kaihatsu (choryuso hendo yosoku gijutsu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    Efforts are exerted to develop technologies for accurately predicting reservoir expansion or other changes through a comprehensive analysis of the fracture hydrology method, gravity monitoring method, electrical and magnetic monitoring method, seismic monitoring method, and their associated technologies. The endeavors cover the development of a post processor system which involves gravity, self-potential, geochemistry, resistivity, etc., and is related to a reservoir simulator, and the development of a reservoir modelling technology. For the development of a post processor system, efforts continue (1) to develop a processor to deal with gravity, self-potential, resistivity, and geochemistry, (2) to carry out basic studies of changes in seismic propagation characteristics, (3) to develop databases, and (4) to develop a simulator interface. Under item (1), development involving gravity, self-potential, and geochemistry is complete, and now manuals are being prepared. A prototype design is complete for resistivity. For the development of a reservoir modelling technology, modelling is under way for the Onikobe and Sumikawa districts. Existing data are taken care of, and productivity predicting simulation is carried out. (NEDO)

  20. NEDO geothermal energy subcommittee. 18th project report meeting; NEDO chinetsu bunkakai. Dai 18 kai jigyo hokokukai

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-09-01

    Reporting on geothermal energy-related efforts, Taro Yamayasu, a NEDO (New Energy and Industrial Technology Development Organization) director, explains the promotion of researches on geothermal energy exploitation, researches on small and medium scale geothermal binary power system utilization, researches on geothermal exploration technology verification, and joint researches on small scale geothermal exploration on remote islands. Achievement reports are delivered concerning geothermal survey technology verification involving the development of reservoir fluctuation probing technology, deep-seated geothermal resources survey, and international joint projects. Concerning the research cooperation promotion project, a joint research program is reported involving a comprehensive geothermal resources analysis system for a remote island in the eastern part of Indonesia. In relation with the development of thermal water power plants, reports are delivered on the development of a 10MW class demonstration plant, development of technologies (study of elements) for a hot dry rock power system, development of a hole bottom data detection system for drilling in thermal water, and the development of deep-seated geothermal resources sampling technologies. (NEDO)

  1. Reservoir characterization of the Upper Jurassic geothermal target formations (Molasse Basin, Germany): role of thermofacies as exploration tool

    Science.gov (United States)

    Homuth, S.; Götz, A. E.; Sass, I.

    2015-06-01

    properties based on outcrop and drilling data demonstrates that this approach is a powerful tool for exploration and operation of geothermal reservoirs.

  2. Analysis of technologies and economics for geothermal energy utilization of electric power plant

    International Nuclear Information System (INIS)

    Haijie, C.

    1993-01-01

    Geothermal energy -- it is a kind of heat energy which pertains to the internal heat of the earth. It carries the heat of the earth outward by the underground water of the rock section of the earth. Normally, the temperature of the thermal water is 50 degrees-140 degrees. During the 20th century, the rapid development of industry and agriculture quickly increased the need for large amounts of electric power. Now, although there are coal power plants, oil and nature gas power plants, hydroelectric power and nuclear power plants, all countries of the world attach importance to the prospect of geothermal power plants. It is the most economic (no consumption fuel) and safe (no pollution) power plant. (Present author considered that the chlorofluorocarbon refrigerants such as RII, R12, and etc. are not used). In 1904, Italy established the first geothermal power plant in the world. Soon afterwards, the U.S.A., Iceland, Japan, Russia, and New Zealand also established geothermal power plants. In 1970, China, North China, Jiang province and Guangdong province also established geothermal power plants. In 1975, the U.S.A. geothermal power plant capacity of 522mw was the first in the world

  3. Improved Pseudo-section Representation for CSAMT Data in Geothermal Exploration

    Science.gov (United States)

    Grandis, Hendra; Sumintadireja, Prihadi

    2017-04-01

    Controlled-Source Audio-frequency Magnetotellurics (CSAMT) is a frequency domain sounding technique employing typically a grounded electric dipole as the primary electromagnetic (EM) source to infer the subsurface resistivity distribution. The use of an artificial source provides coherent signals with higher signal-to-noise ratio and overcomes the problems with randomness and fluctuation of the natural EM fields used in MT. However, being an extension of MT, the CSAMT data still uses apparent resistivity and phase for data representation. The finite transmitter-receiver distance in CSAMT leads to a somewhat “distorted” response of the subsurface compared to MT data. We propose a simple technique to present CSAMT data as an apparent resistivity pseudo-section with more meaningful information for qualitative interpretation. Tests with synthetic and field CSAMT data showed that the simple technique is valid only for sounding curves exhibiting a transition from high - low - high resistivity (i.e. H-type) prevailing in data from a geothermal prospect. For quantitative interpretation, we recommend the use of the full-solution of CSAMT modelling since our technique is not valid for more general cases.

  4. Fiscal 1997 report on the verification survey of geothermal exploration technology. 5-1. Development of the reservoir variation survey method (technology of prediction of reservoir variation); 1997 nendo chinetsu tansa gijutsu nado kensho chosa. Choryuso hendo tansaho kaihatsu (choryuso hendo yosoku gijutsu) hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    For the reservoir evaluation at an initial developmental stage and stabilization/maintenance of power after the start of operation, the fiscal 1997 result was described of the study of technology of prediction of reservoir variation. Using the conventional post processor, feasibilities were computed of reservoir models and behavior after the development, and gravity/self potential/resistivity variation. Variation in the seismic wave speed structure was large in travel time change distribution. The measuring accuracy of 1m sec is required to get enough detection resolving power. A conceptual design of the post processor development was conducted to study a system operated on Windows. Based on the reservoir numerical simulation technology, by taking in variation parameters such as gravity and self potentials as new model constraint conditions, the reservoir modeling technology which increased in accuracy by history matching was trially developed. Using the conventional reservoir model in the Oguni area, predictably computed were reservoir behaviors during 50 years which simulated a 20 MW development. Effectiveness of the post processor were able to be shown though influenced by characteristics such as permeability and resistivity. 74 refs., 95 refs., 12 tabs.

  5. UWB Technology and Applications on Space Exploration

    Science.gov (United States)

    Ngo, Phong; Phan, Chau; Gross, Julia; Dusl, John; Ni, Jianjun; Rafford, Melinda

    2006-01-01

    Ultra-wideband (UWB), also known as impulse or carrier-free radio technology, is one promising new technology. In February 2002, the Federal Communications Commission (FCC) approved the deployment of this technology. It is increasingly recognized that UWB technology holds great potential to provide significant benefits in many terrestrial and space applications such as precise positioning/tracking and high data rate mobile wireless communications. This talk presents an introduction to UWB technology and some applications on space exploration. UWB is characterized by several uniquely attractive features, such as low impact on other RF systems due to its extremely low power spectral densities, immunity to interference from narrow band RF systems due to its ultra-wide bandwidth, multipath immunity to fading due to ample multipath diversity, capable of precise positioning due to fine time resolution, capable of high data rate multi-channel performance. The related FCC regulations, IEEE standardization efforts and industry activities also will be addressed in this talk. For space applications, some projects currently under development at NASA Johnson Space Center will be introduced. These include the UWB integrated communication and tracking system for Lunar/Mars rover and astronauts, UWB-RFID ISS inventory tracking, and UWB-TDOA close-in high resolution tracking for potential applications on robonaut.

  6. Geothermal Energy

    International Nuclear Information System (INIS)

    Haluska, Oscar P.; Tangir, Daniel; Perri, Matias S.

    2002-01-01

    A general overview of geothermal energy is given that includes a short description of the active and stable areas in the world. The possibilities of geothermal development in Argentina are analyzed taking into account the geothermal fields of the country. The environmental benefits of geothermal energy are outlined

  7. Fiscal 1999 research and verification of geothermal energy exploring technologies and the like. Development of reservoir mass and heat flow characterization (Development of fracture hydrological properties characterization technology - Summary); 1999 nendo chinetsu tansa gijutsu nado kensho chosa hokokusho (yoyaku). Choryuso hendo tansaho kaihatsu (danretsu suiri tansaho kaihatsu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    Efforts are under way to develop reservoir change evaluation technologies to be effective in evaluating reservoirs at their initial stage of development, in stabilizing the output of power stations after their commencement of service operation, and in probing into reservoirs in already-developed areas. One of them concerns the characterization of the hydrological properties of fractures. The development efforts involve (1) a pressure transient test method (measurement of the response of reservoirs to changes in borehole internal pressure), (2) a tiltmeter observation method (ground surface deformation measurement), and (3) a 2-phase flow metering method (metering of spurting fluids). Under item (1), a computer-aided borehole hydrology test system is built and field-tested to isolate problems. Also, a pressure transient test system is built by way of trial by use of which compressor-aided control is performed over air pressure in the borehole. Under item (2), it is made clear that changes, several MPa in scale, in the pressure in a borehole is detected by simulation and that a sufficiently capable system is realized using a tiltmeter available on the market. Under item (3), a device is fabricated which is a combination of a laser flowmeter and a void fraction meter, and a field test is conducted to assess its feasibility and to identify problems. (NEDO)

  8. Research on isotope geology. Assessment of heat production potential of granitic rocks and development of geothermal exploration techniques using radioactive/stable isotopes and fission track 2

    Energy Technology Data Exchange (ETDEWEB)

    Shin, Seong Cheon; Chi, Se Jung [Korea Inst. of Geology Mining and Materials, Taejon (Korea, Republic of)

    1995-12-01

    Radioelements and heat production rates of granitic rocks and stable isotopes of groundwaters were analyzed to investigate the geothermal potential of Wolchulsan granite complex in the southern Yeongam area. Wolchulsan granite complex is composed mainly by Cretaceous pink alkali-feldspar granite and partly Jurassic biotite granite. The main target for the geothermal exploration is the alkali-feldspar granite that is known in general to be favorable geothermal reservoir(e.g., Shap granite in UK). To develop exploration techniques for geothermal anomalies, all geochemical data were compared to those from the Jeonju granite complex. Heat production rates(HPR) of the alkali-feldspar granite is 1.8 - 10.6 {mu}Wm{sup -3}. High radio-thermal anomalies were revealed from the central western and northern parts of the granite body. These are relatively higher than the Caledonian hot dry granites in the UK. The integrated assessment of Wolchulsan granite complex suggests potential of the Cretaceous alkali-feldspar granite as a geothermal targets. Groundwater geochemistry of the Yeongam area reflects simple evaporation process and higher oxidation environment. Stable isotope data of groundwaters are plotted on or close to the Meteoric Water Line(MWL). These isotopic data indicate a significant meteoric water dominance and do not show oxygen isotope fractionation between groundwater and wall rocks. In despite of high HPR values of the Yeongam alkali-feldspar granite, groundwater samples do not show the same geochemical properties as a thermal water in the Jeonju area. This reason can be well explained by the comparison with geological settings of the Jeonju area. The Yeongam alkali-feldspar granite does not possess any adjacent heat source rocks despite its high radio-thermal HPR. While the Jeonju granite batholith has later heat source intrusive and suitable deep fracture system for water circulation with sedimentary cap rocks. (Abstract Truncated)

  9. Geothermal Energy: Current abstracts

    Energy Technology Data Exchange (ETDEWEB)

    Ringe, A.C. (ed.)

    1988-02-01

    This bulletin announces the current worldwide information available on the technologies required for economic recovery of geothermal energy and its use as direct heat or for electric power production. (ACR)

  10. Geothermal Modesty

    International Nuclear Information System (INIS)

    Anon.

    2004-01-01

    This publication of the Areva Group, a world nuclear industry leader, provides information on the energy in many domains. This issue deals with the uses for radioactivity, the future of the green electricity, the energy policy of Rhone-alps region, the end of the nuclear in Belgium, the nuclear propulsion to explore the solar system, the involvement of the Unites States in the hydrogen development, the gas exportation of China. A special part is devoted to the possibility of the geothermal energy. (A.L.B.)

  11. Geothermal application feasibility study for the New Mexico Institute of Mining and Technology Campus

    Energy Technology Data Exchange (ETDEWEB)

    Miller, A.R.

    1978-04-01

    This study was limited to determining the economic feasibility of providing the space heating, water heating, space cooling, and electrical power needs of New Mexico Tech from geothermal energy. The means of obtaining the required heat and water from the earth, and the possibility of corrosive effects were not part of this study. The results indicate that space heating and water heating are economically feasible if the cost of developing a geothermal source is not included. The major expense then is the pipeline used to convey the energy to the campus. calculations show that this cost is approximately two to three times our current annual heating bill, The study also showed that it would not be economically feasible to provide our relatively small space cooling and electrical energy needs from geothermal energy.

  12. Gravity and geomagnetic methods in geothermal exploration. Understanding and misunderstanding; Gravimetrie und Geomagnetik bei Geothermieprojekten. Verstaendnis und Missverstaendnis

    Energy Technology Data Exchange (ETDEWEB)

    Ernstson, Kord [Julius-Maximilians-Univ. Wuerzburg, Philosophische Fakultaet I, Hoechberg (Germany); Alt, Wolfgang [Buero fuer Geologie and Balneologie, Gessertshausen (Germany)

    2013-03-15

    To start with taking up clear position: There is not any doubt about the must of detailed seismics as the indisputably most meaningful geophysical method in deep geothermal exploration. But seismics is most expensive, and its practising is not everywhere possible without problems. Hence, here is a basic pleading for additional, lower-cost geophysical pe-site surveys, and it is futile to play off seismics against gravimetry/geomagnetics because both have a basically different methodical approach (travel time method - potential field method). Gravimetry and geomagnetics are inexpensive methods for pre-surveying the general tectonic style, main fault systems, strike directions and lithofacial variations. They serve for a reasonable selection and purchase of suitable profiles of an older 2D seismics and a reasonable selection of locations for a new 2D seismics. Performed as a detailed survey that may help preparing a 3D seismics and where applicable to reduce its volume. As the very advantage of at least gravity measurements we point to the fact that they can be conducted everywhere and without great and lenghty permission procedures. In the end and so doing a cost-effectiv quotation may result for the investor and contracting authorities. This implies of course the discussion about the amount of potential field methods or whether their application is reasonable at all. They do not fix all problems and anywhere, and it is strongly recommended against a standardised procedure anyway but to rely on expert knowledge vital in all geophysics. Whether and to what extent potential field methods are reasonable in the case of 5000 m deep aquifers depends on the specific posing of a question and particularly on the geological superstructure. Although geomagnetic measurements undoubtedly have the potential to contribute to larger-scale pre-site surveys their possibilities within the frame of the small-scale deep geothermics mostly focused on disturbing cultivation areas are to be

  13. Suitability Evaluation of Specific Shallow Geothermal Technologies Using a GIS-Based Multi Criteria Decision Analysis Implementing the Analytic Hierarchic Process

    Directory of Open Access Journals (Sweden)

    Francesco Tinti

    2018-02-01

    Full Text Available The exploitation potential of shallow geothermal energy is usually defined in terms of site-specific ground thermal characteristics. While true, this assumption limits the complexity of the analysis, since feasibility studies involve many other components that must be taken into account when calculating the effective market viability of a geothermal technology or the economic value of a shallow geothermal project. In addition, the results of a feasibility study are not simply the sum of the various factors since some components may be conflicting while others will be of a qualitative nature only. Different approaches are therefore needed to evaluate the suitability of an area for shallow geothermal installation. This paper introduces a new GIS platform-based multicriteria decision analysis method aimed at comparing as many different shallow geothermal relevant factors as possible. Using the Analytic Hierarchic Process Tool, a geolocalized Suitability Index was obtained for a specific technological case: the integrated technologies developed within the GEOTeCH Project. A suitability map for the technologies in question was drawn up for Europe.

  14. Volcanic geothermal system in the Main Ethiopian Rift: insights from 3D MT finite-element inversion and other exploration methods

    Science.gov (United States)

    Samrock, F.; Grayver, A.; Eysteinsson, H.; Saar, M. O.

    2017-12-01

    In search for geothermal resources, especially in exploration for high-enthalpy systems found in regions with active volcanism, the magnetotelluric (MT) method has proven to be an efficient tool. Electrical conductivity of the subsurface, imaged by MT, is used for detecting layers of electrically highly conductive clays which form around the surrounding strata of hot circulating fluids and for delineating magmatic heat sources such as zones with partial melting. We present a case study using a novel 3-D inverse solver, based on adaptive local mesh refinement techniques, applied to decoupled forward and inverse mesh parameterizations. The flexible meshing allows accurate representation of surface topography, while keeping computational costs at a reasonable level. The MT data set we analyze was measured at 112 sites, covering an area of 18 by 11 km at a geothermal prospect in the Main Ethiopian Rift. For inverse modelling, we tested a series of different settings to ensure that the recovered structures are supported by the data. Specifically, we tested different starting models, regularization functionals, sets of transfer functions, with and without inclusion of topography. Several robust subsurface structures were revealed. These are prominent features of a high-enthalpy geothermal system: A highly conductive shallow clay cap occurs in an area with high fumarolic activity, and is underlain by a more resistive zone, which is commonly interpreted as a propylitic reservoir and is the main geothermal target for drilling. An interesting discovery is the existence of a channel-like conductor connecting the geothermal field at the surface with an off-rift conductive zone, whose existence was proposed earlier as being related to an off-rift volcanic belt along the western shoulder of the Main Ethiopian Rift. The electrical conductivity model is interpreted together with results from other geoscientific studies and outcomes from satellite remote sensing techniques.

  15. Human Resources in Geothermal Development

    Energy Technology Data Exchange (ETDEWEB)

    Fridleifsson, I.B.

    1995-01-01

    Some 80 countries are potentially interested in geothermal energy development, and about 50 have quantifiable geothermal utilization at present. Electricity is produced from geothermal in 21 countries (total 38 TWh/a) and direct application is recorded in 35 countries (34 TWh/a). Geothermal electricity production is equally common in industrialized and developing countries, but plays a more important role in the developing countries. Apart from China, direct use is mainly in the industrialized countries and Central and East Europe. There is a surplus of trained geothermal manpower in many industrialized countries. Most of the developing countries as well as Central and East Europe countries still lack trained manpower. The Philippines (PNOC) have demonstrated how a nation can build up a strong geothermal workforce in an exemplary way. Data from Iceland shows how the geothermal manpower needs of a country gradually change from the exploration and field development to monitoring and operations.

  16. Exploring Mobile Technologies for Learning Chinese

    Directory of Open Access Journals (Sweden)

    Jing Wang

    2012-08-01

    Full Text Available The present study aimed to reveal how learners of Chinese as a foreign language use mobile technology to study Chinese outside the classroom. Researchers used sociocultural perspectives to frame the study and grounded theory to analyze data. Eleven English-speaking students who had learned Chinese for different years at a midwestern university participated in the study. They answered 23 major questions by submitting journal entries and participating in an interview. Compared with computer assisted language learning, mobile devices bring changes to tutorial functions, social computing, and gaming. Participants heavily explored tutorial functions, used mobile devices differently from computers for social computing, and showed interest in gaming. Although participants were enthusiastic about using mobile devices to learn Chinese, the number of applications they used and the variety of activities they engaged in were limited. Findings suggest that the effective incorporation of mobile devices to learn Chinese depends on collaboration and scaffolding

  17. Energy Storage Technology Development for Space Exploration

    Science.gov (United States)

    Mercer, Carolyn R.; Jankovsky, Amy L.; Reid, Concha M.; Miller, Thomas B.; Hoberecht, Mark A.

    2011-01-01

    The National Aeronautics and Space Administration is developing battery and fuel cell technology to meet the expected energy storage needs of human exploration systems. Improving battery performance and safety for human missions enhances a number of exploration systems, including un-tethered extravehicular activity suits and transportation systems including landers and rovers. Similarly, improved fuel cell and electrolyzer systems can reduce mass and increase the reliability of electrical power, oxygen, and water generation for crewed vehicles, depots and outposts. To achieve this, NASA is developing non-flow-through proton-exchange-membrane fuel cell stacks, and electrolyzers coupled with low permeability membranes for high pressure operation. The primary advantage of this technology set is the reduction of ancillary parts in the balance-of-plant fewer pumps, separators and related components should result in fewer failure modes and hence a higher probability of achieving very reliable operation, and reduced parasitic power losses enable smaller reactant tanks and therefore systems with lower mass and volume. Key accomplishments over the past year include the fabrication and testing of several robust, small-scale non-flow-through fuel cell stacks that have demonstrated proof-of-concept. NASA is also developing advanced lithium-ion battery cells, targeting cell-level safety and very high specific energy and energy density. Key accomplishments include the development of silicon composite anodes, lithiatedmixed- metal-oxide cathodes, low-flammability electrolytes, and cell-incorporated safety devices that promise to substantially improve battery performance while providing a high level of safety.

  18. An analysis of natural gas exploration potential in the Qiongdongnan Basin by use of the theory of “joint control of source rocks and geothermal heat”

    Directory of Open Access Journals (Sweden)

    Zhang Gongcheng

    2014-10-01

    Full Text Available The Oligocene Yacheng Fm contains the most important source rocks that have been confirmed by exploratory wells in the Qiongdongnan Basin. The efficiency of these source rocks is the key to the breakthrough in natural gas exploration in the study area. This paper analyzes the hydrocarbon potential of each sag in this basin from the perspective of control of both source rocks and geothermal heat. Two types of source rocks occur in the Yacheng Fm, namely mudstone of transitional facies and mudstone of neritic facies. Both of them are dominated by a kerogen of type-III, followed by type-II. Their organic matter abundances are controlled by the amount of continental clastic input. The mudstone of transitional facies is commonly higher in organic matter abundance, while that of neritic facies is lower. The coal-measure source rocks of transitional facies were mainly formed in such environments as delta plains, coastal plains and barrier tidal flat-marshes. Due to the control of Cenozoic lithosphere extension and influence of neotectonism, the geothermal gradient, terrestrial heat flow value (HFV and level of thermal evolution are generally high in deep water. The hot setting not only determines the predominance of gas generation in the deep-water sags, but can promote the shallow-buried source rocks in shallow water into oil window to generate oil. In addition to promoting the hydrocarbon generation of source rocks, the high geothermal and high heat flow value can also speed up the cracking of residual hydrocarbons, thus enhancing hydrocarbon generation efficiency and capacity. According to the theory of joint control of source quality and geothermal heat on hydrocarbon generation, we comprehensively evaluate and rank the exploration potentials of major sags in the Qiongdongnan Basin. These sags are divided into 3 types, of which type-I sags including Yanan, Lingshui, Baodao, Ledong and Huaguang are the highest in hydrocarbon exploration potential.

  19. Thermal conductivity measurements in relation to the geothermal exploration of the Gorleben salt dome

    International Nuclear Information System (INIS)

    Kopietz, J.

    1985-01-01

    The results of thermal conductivity measurements on rock salt and associated structures are presented in this paper. Thermal conductivity data obtained from laboratory measurements on the core material are compared with high-precision temperature gradient logs from the exploration boreholes. This work is part of an extensive investigation into the suitability of the Gorleben salt done in northern Germany as a radioactive waste disposal site

  20. Global geothermal energy scenario

    International Nuclear Information System (INIS)

    Singh, S.K.; Singh, A.; Pandey, G.N.

    1993-01-01

    To resolve the energy crisis efforts have been made in exploring and utilizing nonconventional energy resources since last few decades. Geothermal energy is one such energy resource. Fossil fuels are the earth's energy capital like money deposited in bank years ago. The energy to build this energy came mainly from the sun. Steam geysers and hot water springs are other manifestations of geothermal energy. Most of the 17 countries that today harness geothermal energy have simply tapped such resources where they occur. (author). 8 refs., 4 tabs., 1 fig

  1. Innovative Exploration Techniques for Geothermal Assessment at Jemez Pueblo, New Mexico

    Energy Technology Data Exchange (ETDEWEB)

    Albrecht, Michael

    2015-06-28

    Surface exploration methods like geological mapping, mineralogical analysis, hydrogeochemistry, magnetotelluric as well as seismic, have been used to analyze the study area and identify a location for a production size exploration well. After that location has been identified in a blind resource scenario, a 5,657 feet deep deviated production size exploration well has been drilled. The surface casing is 13 3/8 inch with open hole starting at 4,136 feet. The well has been designed to be deepened up to 8,000 feet if needed. The first 4,180 feet have been sufficiently analyzed and were considered only of direct use interest prior to drilling. That has been confirmed. The remaining depth couldn't be logged by the time the report has been submitted because the well had an obstruction at 4,180 feet. Currently the power production potential for the drilling location cannot be determined without additional work-over of the well. The seismic conducted prior to drilling was a 100% success, providing a clear image of the subsurface and allowing for geosteering to be fact based and on target. Once the obstruction has been removed, work can continue to determine the power generation potential at that location.

  2. Geothermal life cycle assessment - part 3

    Energy Technology Data Exchange (ETDEWEB)

    Sullivan, J. L. [Argonne National Lab. (ANL), Argonne, IL (United States); Frank, E. D. [Argonne National Lab. (ANL), Argonne, IL (United States); Han, J. [Argonne National Lab. (ANL), Argonne, IL (United States); Elgowainy, A. [Argonne National Lab. (ANL), Argonne, IL (United States); Wang, M. Q. [Argonne National Lab. (ANL), Argonne, IL (United States)

    2013-11-01

    A set of key issues pertaining to the environmental performance of geothermal electric power have been addressed. They include: 1) greenhouse gas emissions (GHG) from geothermal facilities, 2) the use of supercritical carbon dioxide (scCO2) as a geofluid for enhanced geothermal systems (EGS), 3) quantifying the impact of well field exploration on the life cycle of geothermal power, and finally 4) criteria pollutant emissions for geothermal and other electric power generation. A GHG emission rate (g/kWh) distribution as function of cumulative running capacity for California has been developed based on California and U. S. government data. The distribution is similar to a global distribution for compared geothermal technologies. A model has been developed to estimate life cycle energy of and CO2 emissions from a coupled pair of coal and EGS plants, the latter of which is powered by scCO2 captured from coal plant side. Depending on the CO2 capture rate on the coal side and the CO2 consumption rate on the EGS side, significant reductions in GHG emissions were computed when the combined system is compared to its conventional coal counterpart. In effect, EGS CO2 consumption acts as a sequestration mechanism for the coal plant. The effects CO2 emissions from the coupled system, prompt on the coal side and reservoir leakage on the EGS side, were considered as well as the subsequent decline of these emissions after entering the atmosphere over a time frame of 100 years. A model was also developed to provide better estimates of the impact of well field exploration on the life cycle performance of geothermal power production. The new estimates increase the overall life cycle metrics for the geothermal systems over those previously estimated. Finally, the GREET model has been updated to include the most recent criteria pollutant emissions for a range of renewable (including geothermal) and other power

  3. Geothermal Energy: Evaluation of a Resource

    Science.gov (United States)

    Bockemuehl, H. W.

    1976-01-01

    This article suggests the use of geothermal energy for producing electricity, using as an example the development at Wairakei, New Zealand. Other geothermal areas are identified, and economic and environmental co sts of additional development are explored. (Author/AV)

  4. Advanced Geothermal Turbodrill

    Energy Technology Data Exchange (ETDEWEB)

    W. C. Maurer

    2000-05-01

    Approximately 50% of the cost of a new geothermal power plant is in the wells that must be drilled. Compared to the majority of oil and gas wells, geothermal wells are more difficult and costly to drill for several reasons. First, most U.S. geothermal resources consist of hot, hard crystalline rock formations which drill much slower than the relatively soft sedimentary formations associated with most oil and gas production. Second, high downhole temperatures can greatly shorten equipment life or preclude the use of some technologies altogether. Third, producing viable levels of electricity from geothermal fields requires the use of large diameter bores and a high degree of fluid communication, both of which increase drilling and completion costs. Optimizing fluid communication often requires creation of a directional well to intersect the best and largest number of fracture capable of producing hot geothermal fluids. Moineau motor stators made with elastomers cannot operate at geothermal temperatures, so they are limited to the upper portion of the hole. To overcome these limitations, Maurer Engineering Inc. (MEI) has developed a turbodrill that does not use elastomers and therefore can operate at geothermal temperatures. This new turbodrill uses a special gear assembly to reduce the output speed, thus allowing a larger range of bit types, especially tri-cone roller bits, which are the bits of choice for drilling hard crystalline formations. The Advanced Geothermal Turbodrill (AGT) represents a significant improvement for drilling geothermal wells and has the potential to significantly reduce drilling costs while increasing production, thereby making geothermal energy less expensive and better able to compete with fossil fuels. The final field test of the AGT will prepare the tool for successful commercialization.

  5. Seismic Technology Adapted to Analyzing and Developing Geothermal Systems Below Surface-Exposed High-Velocity Rocks Final Report

    Energy Technology Data Exchange (ETDEWEB)

    Hardage, Bob A. [Univ. of Texas, Austin, TX (United States). Bureau of Economic Geology; DeAngelo, Michael V. [Univ. of Texas, Austin, TX (United States). Bureau of Economic Geology; Ermolaeva, Elena [Univ. of Texas, Austin, TX (United States). Bureau of Economic Geology; Hardage, Bob A. [Univ. of Texas, Austin, TX (United States). Bureau of Economic Geology; Remington, Randy [Univ. of Texas, Austin, TX (United States). Bureau of Economic Geology; Sava, Diana [Univ. of Texas, Austin, TX (United States). Bureau of Economic Geology; Wagner, Donald [Univ. of Texas, Austin, TX (United States). Bureau of Economic Geology; Wei, Shuijion [Univ. of Texas, Austin, TX (United States). Bureau of Economic Geology

    2013-02-01

    The objective of our research was to develop and demonstrate seismic data-acquisition and data-processing technologies that allow geothermal prospects below high-velocity rock outcrops to be evaluated. To do this, we acquired a 3-component seismic test line across an area of exposed high-velocity rocks in Brewster County, Texas, where there is high heat flow and surface conditions mimic those found at numerous geothermal prospects. Seismic contractors have not succeeded in creating good-quality seismic data in this area for companies who have acquired data for oil and gas exploitation purposes. Our test profile traversed an area where high-velocity rocks and low-velocity sediment were exposed on the surface in alternating patterns that repeated along the test line. We verified that these surface conditions cause non-ending reverberations of Love waves, Rayleigh waves, and shallow critical refractions to travel across the earth surface between the boundaries of the fast-velocity and slow-velocity material exposed on the surface. These reverberating surface waves form the high level of noise in this area that does not allow reflections from deep interfaces to be seen and utilized. Our data-acquisition method of deploying a box array of closely spaced geophones allowed us to recognize and evaluate these surface-wave noise modes regardless of the azimuth direction to the surface anomaly that backscattered the waves and caused them to return to the test-line profile. With this knowledge of the surface-wave noise, we were able to process these test-line data to create P-P and SH-SH images that were superior to those produced by a skilled seismic data-processing contractor. Compared to the P-P data acquired along the test line, the SH-SH data provided a better detection of faults and could be used to trace these faults upward to the boundaries of exposed surface rocks. We expanded our comparison of the relative value of S-wave and P-wave seismic data for geothermal

  6. Novel approaches for an enhanced geothermal development of residential sites

    Science.gov (United States)

    Schelenz, Sophie; Firmbach, Linda; Shao, Haibing; Dietrich, Peter; Vienken, Thomas

    2015-04-01

    An ongoing technological enhancement drives an increasing use of shallow geothermal systems for heating and cooling applications. However, even in areas with intensive shallow geothermal use, planning of geothermal systems is in many cases solely based on geological maps, drilling databases, and literature references. Thus, relevant heat transport parameters are rather approximated than measured for the specific site. To increase the planning safety and promote the use of renewable energies in the domestic sector, this study investigates a novel concept for an enhanced geothermal development of residential neighbourhoods. This concept is based on a site-specific characterization of subsurface conditions and the implementation of demand-oriented geothermal usage options. Therefore, an investigation approach has been tested that combines non-invasive with minimum-invasive exploration methods. While electrical resistivity tomography has been applied to characterize the geological subsurface structure, Direct Push soundings enable a detailed, vertical high-resolution characterization of the subsurface surrounding the borehole heat exchangers. The benefit of this site-specific subsurface investigation is highlighted for 1) a more precise design of shallow geothermal systems and 2) a reliable prediction of induced long-term changes in groundwater temperatures. To guarantee the financial feasibility and practicability of the novel geothermal development, three different options for its implementation in residential neighbourhoods were consequently deduced.

  7. Mathematics as a key technology in geothermal power; Mathematik als Schluesseltechnologie in der Geothermie

    Energy Technology Data Exchange (ETDEWEB)

    Freeden, Willi; Augustin, Matthias [TU Kaiserslautern (Germany); Ostermann, Isabel [Fraunhofer ITWM, Kaiserslautern (Germany)

    2011-07-15

    The demand on alternative energy sources is growing daily - more and more it determines the current economic situation and economic development. One of the most promising renewable energy source is the geothermal energy. From the perspective of mathematics, the reduction of occuring prospecting risk means a modelling of both the necessary parameters as well as the occuring processes using existing data. In the working group Geomathematics of the Technical University of Kaiserslautern a column model has been developed.

  8. Hot dry rock geothermal energy: status of exploration and assessment. Report No. 1 of the hot dry rock assessment panel

    Energy Technology Data Exchange (ETDEWEB)

    1977-06-01

    The status of knowledge of attempts to utilize hot dry rock (HDR) geothermal energy is summarized. It contains (1) descriptions or case histories of the ERDA-funded projects at Marysville, MT, Fenton Hill, NM, and Coso Hot Springs, CA; (2) a review of the status of existing techniques available for exploration and delineation of HDR; (3) descriptions of other potential HDR sites; (4) definitions of the probable types of HDR resource localities; and (5) an estimate of the magnitude of the HDR resource base in the conterminous United States. The scope is limited to that part of HDR resource assessment related to the determination of the extent and character of HDR, with emphasis on the igneous-related type. It is estimated that approximately 74 Q (1 Q = 1,000 Quads) of heat is stored in these sites within the conterminous U.S. at depths less than 10 km and temperatures above 150/sup 0/C, the minimum for power generation. (Q = 10/sup 18/ BTU = 10/sup 21/J; the total U.S. consumption for 1972 was approximately 0.07 Q). Approximately 6300 Q are stored in the conduction-dominated parts of the crust in the western U.S. (23% of the total surface area), again at depths less than 10 km and temperatures above 150/sup 0/C. Nearly 10,000 Q are believed to be contained in crustal rocks underlying the entire conterminous U.S., at temperatures above 150/sup 0/C. The resource base is significantly larger for lower grade heat. (JGB)

  9. Publications and geothermal sample library facilities of the Earth Science Laboratory, University of Utah Research Institute

    Energy Technology Data Exchange (ETDEWEB)

    Wright, Phillip M.; Ruth, Kathryn A.; Langton, David R.; Bullett, Michael J.

    1990-03-30

    The Earth Science Laboratory of the University of Utah Research Institute has been involved in research in geothermal exploration and development for the past eleven years. Our work has resulted in the publication of nearly 500 reports, which are listed in this document. Over the years, we have collected drill chip and core samples from more than 180 drill holes in geothermal areas, and most of these samples are available to others for research, exploration and similar purposes. We hope that scientists and engineers involved in industrial geothermal development will find our technology transfer and service efforts helpful.

  10. Assessing innovation in emerging energy technologies: Socio-technical dynamics of carbon capture and storage (CCS) and enhanced geothermal systems (EGS) in the USA

    International Nuclear Information System (INIS)

    Stephens, Jennie C.; Jiusto, Scott

    2010-01-01

    This study applies a socio-technical systems perspective to explore innovation dynamics of two emerging energy technologies with potential to reduce greenhouse gas emissions from electrical power generation in the United States: carbon capture and storage (CCS) and enhanced geothermal systems (EGS). The goal of the study is to inform sustainability science theory and energy policy deliberations by examining how social and political dynamics are shaping the struggle for resources by these two emerging, not-yet-widely commercializable socio-technical systems. This characterization of socio-technical dynamics of CCS and EGS innovation includes examining the perceived technical, environmental, and financial risks and benefits of each system, as well as the discourses and actor networks through which the competition for resources - particularly public resources - is being waged. CCS and EGS were selected for the study because they vary considerably with respect to their social, technical, and environmental implications and risks, are unproven at scale and uncertain with respect to cost, feasibility, and life-cycle environmental impacts. By assessing the two technologies in parallel, the study highlights important social and political dimensions of energy technology innovation in order to inform theory and suggest new approaches to policy analysis.

  11. Environmental overview for the development of geothermal resources in the State of New Mexico. Final report

    Energy Technology Data Exchange (ETDEWEB)

    Bryant, M.; Starkey, A.H.; Dick-Peddie, W.A.

    1980-06-01

    A brief overview of the present day geothermal applications for hydrothermal electrical generation and direct heat use and their environmental implications is provided. Technologies and environmental impacts are considered at all points on the pathway of development resource exploration; well field, plant and transmission line construction; and plant operation. The technologies for electrical generation-direct, dry steam conversion; separated steam conversion; single-flash conversion, separated-steam/single-flash conversion and binary cycle conversion and the technologies for direct heat use - direct use of geothermal waters, surface heat exhanger, down-the hole heat exchanger and heat pump are described. A summary of the geothermal technologies planned or in operation within New Mexico geothermal areas is provided. A review of regulations that affect geothermal development and its related environmental impact in New Mexico is presented. The regulatory pathway, both state and federal, of geothermal exploration after the securing of appropriate leases, development, and construction and implementation of a geothermal facility are described. Six categories (Geophysical, Water, Air, Noise, Biota and Socioeconomics) were selected for environmental assessment. The data available is described.

  12. Joint 3D Inversion of ZTEM Airborne and Ground MT Data with Application to Geothermal Exploration

    Science.gov (United States)

    Wannamaker, P. E.; Maris, V.; Kordy, M. A.

    2017-12-01

    ZTEM is an airborne electromagnetic (EM) geophysical technique developed by Geotech Inc® where naturally propagated EM fields originating with regional and global lightning discharges (sferics) are measured as a means of inferring subsurface electrical resistivity structure. A helicopter-borne coil platform (bird) measuring the vertical component of magnetic (H) field variations along a flown profile is referenced to a pair of horizontal coils at a fixed location on the ground in order to estimate a tensor H-field transfer function. The ZTEM method is distinct from the traditional magnetotelluric (MT) method in that the electric (E) fields are not considered because of the technological challenge of measuring E-fields in the dielectric air medium. This can lend some non-uniqueness to ZTEM interpretation because a range of conductivity structures in the earth depending upon an assumed background earth resistivity model can fit ZTEM data to within tolerance. MT data do not suffer this particular problem, but they are cumbersome to acquire in their common need for land-based transport often in near-roadless areas and for laying out and digging the electrodes and H coils. The complementary nature of ZTEM and MT logistics and resolution has motivated development of schemes to acquire appropriate amounts of each data type in a single survey and to produce an earth image through joint inversion. In particular, consideration is given to surveys where only sparse MT soundings are needed to drastically reduce the non-uniqueness associated with background uncertainty while straining logistics minimally. Synthetic and field data are analysed using 2D and 3D finite element platforms developed for this purpose. Results to date suggest that indeed dense ZTEM surveys can provide detailed heterogeneous model images with large-scale averages constrained by a modest number of MT soundings. Further research is needed in determining the allowable degree of MT sparseness and the

  13. Geothermal Anomaly Mapping Using Landsat ETM+ Data in Ilan Plain, Northeastern Taiwan

    Science.gov (United States)

    Chan, Hai-Po; Chang, Chung-Pai; Dao, Phuong D.

    2018-01-01

    Geothermal energy is an increasingly important component of green energy in the globe. A prerequisite for geothermal energy development is to acquire the local and regional geothermal prospects. Existing geophysical methods of estimating the geothermal potential are usually limited to the scope of prospecting because of the operation cost and site reachability in the field. Thus, explorations in a large-scale area such as the surface temperature and the thermal anomaly primarily rely on satellite thermal infrared imagery. This study aims to apply and integrate thermal infrared (TIR) remote sensing technology with existing geophysical methods for the geothermal exploration in Taiwan. Landsat 7 (L7) Enhanced Thematic Mapper Plus (ETM+) imagery is used to retrieve the land surface temperature (LST) in Ilan plain. Accuracy assessment of satellite-derived LST is conducted by comparing with the air temperature data from 11 permanent meteorological stations. The correlation coefficient of linear regression between air temperature and LST retrieval is 0.76. The MODIS LST product is used for the cross validation of Landsat derived LSTs. Furthermore, Landsat ETM+ multi-temporal brightness temperature imagery for the verification of the LST anomaly results were performed. LST Results indicate that thermal anomaly areas appear correlating with the development of faulted structure. Selected geothermal anomaly areas are validated in detail by field investigation of hot springs and geothermal drillings. It implies that occurrences of hot springs and geothermal drillings are in good spatial agreement with anomaly areas. In addition, the significant low-resistivity zones observed in the resistivity sections are echoed with the LST profiles when compared with in the Chingshui geothermal field. Despite limited to detecting the surficial and the shallow buried geothermal resources, this work suggests that TIR remote sensing is a valuable tool by providing an effective way of mapping

  14. The Pawsey Supercomputer geothermal cooling project

    Science.gov (United States)

    Regenauer-Lieb, K.; Horowitz, F.; Western Australian Geothermal Centre Of Excellence, T.

    2010-12-01

    The Australian Government has funded the Pawsey supercomputer in Perth, Western Australia, providing computational infrastructure intended to support the future operations of the Australian Square Kilometre Array radiotelescope and to boost next-generation computational geosciences in Australia. Supplementary funds have been directed to the development of a geothermal exploration well to research the potential for direct heat use applications at the Pawsey Centre site. Cooling the Pawsey supercomputer may be achieved by geothermal heat exchange rather than by conventional electrical power cooling, thus reducing the carbon footprint of the Pawsey Centre and demonstrating an innovative green technology that is widely applicable in industry and urban centres across the world. The exploration well is scheduled to be completed in 2013, with drilling due to commence in the third quarter of 2011. One year is allocated to finalizing the design of the exploration, monitoring and research well. Success in the geothermal exploration and research program will result in an industrial-scale geothermal cooling facility at the Pawsey Centre, and will provide a world-class student training environment in geothermal energy systems. A similar system is partially funded and in advanced planning to provide base-load air-conditioning for the main campus of the University of Western Australia. Both systems are expected to draw ~80-95 degrees C water from aquifers lying between 2000 and 3000 meters depth from naturally permeable rocks of the Perth sedimentary basin. The geothermal water will be run through absorption chilling devices, which only require heat (as opposed to mechanical work) to power a chilled water stream adequate to meet the cooling requirements. Once the heat has been removed from the geothermal water, licensing issues require the water to be re-injected back into the aquifer system. These systems are intended to demonstrate the feasibility of powering large-scale air

  15. Geothermal spas

    International Nuclear Information System (INIS)

    Woodruff, J.L.; Takahashi, P.K.

    1990-01-01

    The spa business, part of the health and fitness industry that has sprung up in recent years, is highly successful world-wide. The most traditional type of spa is the geothermal spa, found in geothermal areas around the world. In Japan, for example, some 2,000 geothermal spas and resorts generate $6 billion annually. Hawaii has an ideal environment for geothermal spas, and several locations in the islands could supply warm mineral water for spa development. Hawaii receives about 6 million visitors annually, a high percentage of whom are familiar with the relaxing and therapeutic value of geothermal spas, virtually guaranteeing the success of this industry in Hawaii. Presently, Hawaii does not have a single geothermal spa. This paper reports that the geothermal spa business is an industry whose time has come, an industry that offers very promising investment opportunities, and one that would improve the economy while expanding the diversity of pleasurable vacation options in Hawaii

  16. Water Intensity of Electricity from Geothermal Resources

    Science.gov (United States)

    Mishra, G. S.; Glassley, W. E.

    2010-12-01

    BACKGROUND Electricity from geothermal resources could play a significant role in the United States over the next few decades; a 2006 study by MIT expects a capacity of 100GWe by 2050 as feasible; approximately 10% of total electricity generating capacity up from less than 1% today. However, there is limited research on the water requirements and impacts of generating electricity from geothermal resources - conventional as well as enhanced. To the best of our knowledge, there is no baseline exists for water requirements of geothermal electricity. Water is primarily required for cooling and dissipation of waste heat in the power plants, and to account for fluid losses during heat mining of enhanced geothermal resources. MODEL DESCRIPTION We have developed a model to assess and characterize water requirements of electricity from hydrothermal resources and enhanced geothermal resources (EGS). Our model also considers a host of factors that influence cooling water requirements ; these include the temperature and chemical composition of geothermal resource; installed power generation technology - flash, organic rankine cycle and the various configurations of these technologies; cooling technologies including air cooled condensers, wet recirculating cooling, and hybrid cooling; and finally water treatment and recycling installations. We expect to identify critical factors and technologies. Requirements for freshwater, degraded water and geothermal fluid are separately estimated. METHODOLOGY We have adopted a lifecycle analysis perspective that estimates water consumption at the goethermal field and power plant, and accounts for transmission and distribution losses before reaching the end user. Our model depends upon an extensive literature review to determine various relationships necessary to determine water usage - for example relationship between thermal efficiency and temperature of a binary power plant, or differences in efficiency between various ORC configurations

  17. District space heating potential of low temperature hydrothermal geothermal resources in the southwestern United States. Technical report

    Energy Technology Data Exchange (ETDEWEB)

    McDevitt, P.K.; Rao, C.R.

    1978-10-01

    A computer simulation model (GIRORA-Nonelectric) is developed to study the economics of district space heating using geothermal energy. GIRORA-Nonelectric is a discounted cashflow investment model which evaluates the financial return on investment for space heating. This model consists of two major submodels: the exploration for and development of a geothermal anomaly by a geothermal producer, and the purchase of geothermal fluid by a district heating unit. The primary output of the model is a calculated rate of return on investment earned by the geothermal producer. The results of the sensitivity analysis of the model subject to changes in physical and economic parameters are given in this report. Using the results of the economic analysis and technological screening criteria, all the low temperature geothermal sites in Southwestern United States are examined for economic viability for space heating application. The methodology adopted and the results are given.

  18. ''Geothermal Energy Allgaeu 2.0''. Project for the exploration of an improvement of deep geothermal systems in Allgaeu; ''Geothermie Allgaeu 2.0''. Projekt zur Erforschung einer Verbesserung von tiefengeothermischen Systemen im Allgaeu

    Energy Technology Data Exchange (ETDEWEB)

    Kreuter, Horst; Schrage, Christina; Volland, Sabine [GeoThermal Engineering GmbH, Karlsruhe (Germany); Bems, Curd; Hild, Stephan [Exorka GmbH, Gruenwald/Geiselgasteig (Germany)

    2011-10-24

    Based on a joint research project for the geothermal exploration of deep reservoir of the Malm limestone in the Allgaeu region (western Molasse) water flow paths are to be improved by developing a petrothermal system in a carbonate horizon. In 2008, in Mauerstetten (Federal Republic of Germany) the first bore hole was sunk for the hydrothermal development of the Malm. Geological and technical problems forced the relocation of the drilling compared with the initial planning. Since the drilling in this area turned out unsuccessful, the lower part of the borehole was abandoned. Over a sidetrack the original target horizon of the upper Malm is achieved. After various tests, the well proved dry and was abandoned. As part of a joint research project it will be attempted over the next two years to create a heat exchange area by means of the petrothermal technology. The results can be applied to other locations in the molasses with the Upper Malm reservoir.

  19. Baseline System Costs for 50.0 MW Enhanced Geothermal System -- A Function of: Working Fluid, Technology, and Location, Location, Location

    Energy Technology Data Exchange (ETDEWEB)

    Dunn, Paul [Gas Equipment Engineering Corp., Milford, CT (United States); Selman, Nancy [Gas Equipment Engineering Corp., Milford, CT (United States); Volpe, Anthony Della [Gas Equipment Engineering Corp., Milford, CT (United States); Moss, Deborah [Gas Equipment Engineering Corp., Milford, CT (United States); Mobley, Rick [Plasma Energy Services, LLC, Putnam, CT (United States); Dickey, Halley [Turbine Air Systems, Houston, TX (United States); Unruh, Jeffery [Fugro NV/Wm. Lettis & Associates, Houston, TX (United States); Hitchcock, Chris [Fugro NV/Wm. Lettis & Associates, Houston, TX (United States); Tanguay, Jasmine [Conservation Law Foundation/CLF Ventures, Boston, MA (United States); Larsen, Walker [Conservation Law Foundation/CLF Ventures, Boston, MA (United States); Sanyal, Sabir [GeothermEx, Inc., San Pablo, CA (United States); Butler, Steven [GeothermEx, Inc., San Pablo, CA (United States); Stacey, Robert [GeothermEx, Inc., San Pablo, CA (United States); Robertson-Tait, Ann [GeothermEx, Inc., San Pablo, CA (United States); Pruess, Karsten [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Gutoski, Greg [Fairbanks Morse Engines (FME), Beloit, WI (United States); Fay, Jamie M. [Fort Point Associates, Boston, MA (United States); Stitzer, John T. [Fort Point Associates, Boston, MA (United States); Oglesby, Ken [Impact Technologies LLC, Tulsa, OK (United States)

    2012-04-30

    Substantial unexploited opportunity exists for the US, and the world, in Enhanced Geothermal Systems (EGS). As a result of US DOE investment, new drilling technology, new power generation equipment and cycles enable meaningful power production, in a compact and modular fashion; at lower and lower top side EGS working fluid temperatures and in a broader range of geologies and geographies. This cost analysis effort supports the expansion of Enhanced Geothermal Systems (EGS), furthering DOE strategic themes of energy security and sub goal of energy diversity; reducing the Nation's dependence on foreign oil while improving the environment.

  20. The Geothermal Data Repository: Five Years of Open Geothermal Data, Benefits to the Community: Preprint

    Energy Technology Data Exchange (ETDEWEB)

    Weers, Jonathan D [National Renewable Energy Laboratory (NREL), Golden, CO (United States); Taverna, Nicole [National Renewable Energy Laboratory (NREL), Golden, CO (United States); Anderson, Arlene [U.S. Department of Energy

    2018-04-02

    In the five years since its inception, the Department of Energy's (DOE) Geothermal Data Repository (GDR) has grown from the simple idea of storing public data in a centralized location to a valuable tool at the center of the DOE open data movement where it is providing a tangible benefit to the geothermal scientific community. Throughout this time, the GDR project team has been working closely with the community to refine the data submission process, improve the quality of submitted data, and embrace modern proper data management strategies to maximize the value and utility of submitted data. This paper explores some of the motivations behind various improvements to the GDR over the last 5 years, changes in data submission trends, and the ways in which these improvements have helped to drive research, fuel innovation, and accelerate the adoption of geothermal technologies.

  1. An Exploration of Principal Instructional Technology Leadership

    Science.gov (United States)

    Townsend, LaTricia Walker

    2013-01-01

    Nationwide the demand for schools to incorporate technology into their educational programs is great. In response, North Carolina developed the IMPACT model in 2003 to provide a comprehensive model for technology integration in the state. The model is aligned to national educational technology standards for teachers, students, and principals.…

  2. Geothermal studies in China

    Science.gov (United States)

    Ji-Yang, Wang; Mo-Xiang, Chen; Ji-An, Wang; Xiao, Deng; Jun, Wang; Hsien-Chieh, Shen; Liang-Ping, Hsiung; Shu-Zhen, Yan; Zhi-Cheng, Fan; Xiu-Wen, Liu; Ge-Shan, Huang; Wen-Ren, Zhang; Hai-Hui, Shao; Rong-Yan, Zhang

    1981-01-01

    Geothermal studies have been conducted in China continuously since the end of the 1950's with renewed activity since 1970. Three areas of research are defined: (1) fundamental theoretical research on geothermics, including subsurface temperatures, terrestrial heat flow and geothermal modeling; (2) exploration for geothermal resources and exploitation of geothermal energy; and (3) geothermal studies in mines. Regional geothermal studies have been conducted recently in North China and more than 2000 values of subsurface temperature have been obtained. Temperatures at a depth of 300 m generally range from 20 to 25°C with geothermal gradients from 20 to 40°C/km. These values are regarded as an average for the region with anomalies related to geological factors. To date, 22 reliable heat flow data from 17 sites have been obtained in North China and the data have been categorized according to fault block tectonics. The average heat flow value at 16 sites in the north is 1.3 HFU, varying from 0.7 to 1.8 HFU. It is apparent that the North China fault block is characterized by a relatively high heat flow with wide variations in magnitude compared to the mean value for similar tectonic units in other parts of the world. It is suggested that although the North China fault block can be traced back to the Archaean, the tectonic activity has been strengthening since the Mesozoic resulting in so-called "reactivation of platform" with large-scale faulting and magmatism. Geothermal resources in China are extensive; more than 2000 hot springs have been found and there are other manifestations including geysers, hydrothermal explosions, hydrothermal steam, fumaroles, high-temperature fountains, boiling springs, pools of boiling mud, etc. In addition, there are many Meso-Cenozoic sedimentary basins with widespread aquifers containing geothermal water resources in abundance. The extensive exploration and exploitation of these geothermal resources began early in the 1970's. Since then

  3. Exploration Technology Development including Surface Acoustic Wave RFID chips

    Data.gov (United States)

    National Aeronautics and Space Administration — This project is focused on maturing future surface exploration technologies and instrumentation and working towards flight instrumentation and systems to support...

  4. Contribution of the exploration of deep crystalline fractured reservoir of Soultz to the knowledge of enhanced geothermal systems (EGS)

    Science.gov (United States)

    Genter, Albert; Evans, Keith; Cuenot, Nicolas; Fritsch, Daniel; Sanjuan, Bernard

    2010-07-01

    Over the past 20 years, the Soultz experimental geothermal site in Alsace, France, has been explored in detail by the drilling of five boreholes, three of which extend to 5 km depth. Data on geology, fluid geochemistry, temperature, microseismicity, hydraulics and geomechanics have been collected and interpreted by the various teams from the participating European countries and their international collaborators. Two reservoirs have been developed within granite at depths of 3.5 and 5 km. The reservoir at 3.5 km was formed from two wells, 450 m apart, both of which were subjected to hydraulic stimulation injections. The system was circulated continuously for 4 months at 25 kg/s in 1997 using a downhole pump, and yielded results that were extremely encouraging. The impedance reduced to 0.1 MPa/l/s, the first time this long-standing target had been attained. Construction of a deeper system began shortly afterwards with the drilling of 3 deviated wells to 5 km true vertical depth, where the temperature was 200 °C. The wells were drilled in a line, 600 m apart at reservoir depth, and all were hydraulically stimulated and subjected to acidization injections. The 3-well system was circulated under buoyancy drive for 5 months in 2005 with injection in the central well, GPK-3, and production from the two outer wells, GPK-2 and GPK-4. This showed good linkage between one doublet pair, but not the other. Further acidization operations on the low-productivity well led to its productivity increasing to almost the same level as the other wells. Construction of a power plant at the site was completed in 2008 and a trial circulation with a production pump in one well and the other shut-in was conducted with power production. Downhole pumps are now installed in both production wells in preparation for long-term circulation of the system. In this article we present an overview of the principal accomplishments at Soultz over the past two decades, and highlight the main results

  5. Geothermal Energy: Delivering on the Global Potential

    Directory of Open Access Journals (Sweden)

    Paul L. Younger

    2015-10-01

    Full Text Available Geothermal energy has been harnessed for recreational uses for millennia, but only for electricity generation for a little over a century. Although geothermal is unique amongst renewables for its baseload and renewable heat provision capabilities, uptake continues to lag far behind that of solar and wind. This is mainly attributable to (i uncertainties over resource availability in poorly-explored reservoirs and (ii the concentration of full-lifetime costs into early-stage capital expenditure (capex. Recent advances in reservoir characterization techniques are beginning to narrow the bounds of exploration uncertainty, both by improving estimates of reservoir geometry and properties, and by providing pre-drilling estimates of temperature at depth. Advances in drilling technologies and management have potential to significantly lower initial capex, while operating expenditure is being further reduced by more effective reservoir management—supported by robust models—and increasingly efficient energy conversion systems (flash, binary and combined-heat-and-power. Advances in characterization and modelling are also improving management of shallow low-enthalpy resources that can only be exploited using heat-pump technology. Taken together with increased public appreciation of the benefits of geothermal, the technology is finally ready to take its place as a mainstream renewable technology, exploited far beyond its traditional confines in the world’s volcanic regions.

  6. Geothermal Energy: Tapping the Potential

    Science.gov (United States)

    Johnson, Bill

    2008-01-01

    Ground source geothermal energy enables one to tap into the earth's stored renewable energy for heating and cooling facilities. Proper application of ground-source geothermal technology can have a dramatic impact on the efficiency and financial performance of building energy utilization (30%+). At the same time, using this alternative energy…

  7. The Future of Geothermal Energy

    Energy Technology Data Exchange (ETDEWEB)

    Kubik, Michelle [Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

    2006-01-01

    A comprehensive assessment of enhanced, or engineered, geothermal systems was carried out by an 18-member panel assembled by the Massachusetts Institute of Technology (MIT) to evaluate the potential of geothermal energy becoming a major energy source for the United States.

  8. Fiscal 1996 verification and survey of geothermal prospecting technology etc. 1/2. Survey report on deep-seated geothermal resources; 1996 nendo chinetsu tansa gijutsu nado kensho chosa hokokusho. 1/2. Shinbu chinetsu shigen chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    For the purpose of reducing the risk to accompany the exploitation of deep-seated geothermal resources, investigations are conducted into the three factors that govern the formation of geothermal resources at deep levels, that is, the supply of heat from heat sources, the supply of geothermal fluids, and the development of fracture systems contributing to the constitution of reservoir structures. In fiscal 1996, the deep-seated exploration well WD-1a is sidetracked for penetration for a target newly assigned at the 3,000m-deep level. Carried out in a survey of well geology are the naked-eye and microscopic observation of core cuttings, X-ray powder method, examination of inclusions in fluids, chemical analysis of whole rocks, analysis of isotopes in minerals, analysis of core fracturing, etc. Also, data are collected from a survey of mud log, survey of water in the well before digging, and from well logging. Furthermore, pressure monitoring etc. are conducted in order to determine the interference in pressure between the deep-seated and shallow-seated wells that accompanies multiple outbursts from the Kakkonda No. 2 machine, to know the water permeability between the shallow-seated and deep-seated parts, and to grasp the anisotropy in permeability in shallow-seated reservoirs. (NEDO)

  9. Geothermal energy

    International Nuclear Information System (INIS)

    Le Du, H.; Bouchot, V.; Lopez, S.; Bialkowski, A.; Colnot, A.; Rigollet, C.; Sanjuan, B.; Millot, R.; Brach, M.; Asmundsson, R.; Giroud, N.

    2010-01-01

    Geothermal energy has shown a revival for several years and should strongly develop in a near future. Its potentiality is virtually unexhaustible. Its uses are multiple and various: individual and collective space heating, heat networks, power generation, heat storage, heat exchanges etc.. Re-launched by the demand of renewable energy sources, geothermal energy has become credible thanks to the scientific works published recently which have demonstrated its economical and technical relevance. Its image to the public is changing as well. However, lot of work remains to do to make geothermal energy a real industry in France. Several brakes have to be removed rapidly which concern the noise pollution of geothermal facilities, the risk of bad results of drillings, the electricity costs etc. This dossier gives an overview of today's main research paths in the domain of geothermal energy: 1 - geothermal energy in France: historical development, surface and deep resources, ambitions of the French national energy plan (pluri-annual investment plan for heat generation, incentives, regional 'climate-air-energy' schemes), specific regulations; 2 - geothermal energy at the city scale - sedimentary basins: Ile-de-France 40 years of Dogger reservoir exploitation, potentialities of clastic reservoirs - the Chaunoy sandstones example; 3 - geothermal power generation: conventional reservoirs - the Bouillante model (Guadeloupe, French Indies); the Soultz-sous-Forets pilot plant (Bas-Rhin, France); the supercritical reservoirs - the Krafla geothermal area (Iceland). (J.S.)

  10. Areas to explore surrounding the Cerro Prieto geothermal field, BC; Areas para exploracion en los alrededores del campo geotermico de Cerro Prieto, BC

    Energy Technology Data Exchange (ETDEWEB)

    Aguilar Dumas, Alvaro [Comision Federal de Electricidad, Gerencia de Proyectos Geotermoelectricos, Residencia General de Cerro Prieto, Mexicali, Baja California (Mexico)]. E-mail: alvaro.aguilar@cfe.gob.mx

    2009-07-15

    Exploration plays an important role in tapping underground natural resources-whether water, oil, natural gas or minerals. Exploratory data allow us to learn reservoir conditions, increasing probable reserves and reservoir life span. Around the Cerro Prieto geothermal field, BC, and in the Mexicali Valley in general, exploration had almost stopped but recently was resumed by the Studies Division of Comision Federal de ELectricidad (CFE)'s Gerencia de Proyectos Geotermoelectricos. The division sent technical personnel to structurally map the northern and eastern portions of Laguna Salada. The paper offers a general outline of the main zones undergoing exploratory studies-studies perhaps culminating in siting exploratory wells to locate more geothermal resources (and ultimately producing them using binary power plants). CFE also wants to site injection wells west of the current production zone, and this is covered, as well. All activities are meant to increase the productive lifespan of the geothermal reservoir. [Spanish] Cuando se trata de la explotacion de recursos naturales del subsuelo, sea agua, gas, petroleo o minerales, la exploracion juega un papel muy importante, ya que permite conocer las condiciones del yacimiento que pudieran llevar a incrementar las reservas de los recursos explotados y extender su vida util. En las zonas aledanas al campo geotermico de Cerro Prieto, BC, y en general en el Valle de Mexicali, la exploracion estaba practicamente detenida habiendose reactivado a raiz de que la Subgerencia de Estudios de la Gerencia de Proyectos Geotermoelectricos de la Comision Federal de Electricidad (CFE) envio personal para realizar mapeos estructurales en las porciones norte y oriente de la Laguna Salada. Este trabajo presenta un panorama general de las areas prioritarias para realizar estudios exploratorios y poder programar, con mas bases, pozos exploratorios enfocados a localizar mas recursos geotermicos, inclusive para generar energia por medio

  11. Fiscal 1996 report on the results of the subsidy operation under the Sunshine Project on the development of a geothermal water use power plant, etc. Development of the deep geothermal resource collecting technology (development of the deep geothermal resource drilling technology); 1996 nendo New Sunshine keikaku hojo jigyo seika hokokusho. Nessui riyo hatsuden plant nado kaihatsu (shinbu chinetsu shigen saishu gijutsu no kaihatsu / shinbu chinetsu shigen kussaku gijutsu no kaihatsu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    The paper reported the results of the fiscal 1996 R and D on the development of deep geothermal resource collecting/drilling technology. In the design of a total development, the planned adjustment of actual well tests was conducted on bits and drilling mud at the time of drilling the exploration well of the Kakkonda area. As to the trend of overseas technology, examined was the developmental trend of high temperature type downhole motor products. In the development of hard high temperature strata drilling element technology, a drilling test was carried out on trially manufactured 300degC heat resistant/durable bits. In the development of high temperature drilling mud, drilling was done in the mud of thermally stable quality in the actual well experiment using the 300degC mud system. In the development of high temperature use cement and high temperature use cement slurry, a possibility was obtained of composing a slurry which has the targeted dewatering amount, compressive strength, and water permeability. In the development of high temperature downhole motor, data on characteristics of heat resistant stator materials were arranged in a relationship among the abrasion amount, thermal expansion amount and elastic recovery amount, and the database was obtained. 166 figs., 148 tabs.

  12. Proceedings of the Conference on Research for the Development of Geothermal Energy Resources

    Science.gov (United States)

    1974-01-01

    The proceedings of a conference on the development of geothermal energy resources are presented. The purpose of the conference was to acquaint potential user groups with the Federal and National Science Foundation geothermal programs and the method by which the users and other interested members can participate in the program. Among the subjects discussed are: (1) resources exploration and assessment, (2) environmental, legal, and institutional research, (3) resource utilization projects, and (4) advanced research and technology.

  13. Geothermal energy

    International Nuclear Information System (INIS)

    Kappelmeyer, O.

    1991-01-01

    Geothermal energy is the natural heat of the earth. It represents an inexhaustible source of energy. In many countries, which are mostly located within the geothermal belts of the world, geothermal energy is being used since many decades for electricity generation and direct heating applications comprising municipal, industrial and agricultural heating. Outside the geothermal anomalous volcanic regions, hot ground water from deep rock formations at temperatures above 70 o C is used for process heat and space heating. Low prices for gas and oil hinder the development of geothermal plants in areas outside positive geothermal anomalies; the cost of drilling to reach depths, where temperatures are above 50 o C to 70 o C, is high. The necessary total investment per MW th installed capacity is in the order of 5 Mio- DM/MW th (3 Mio $/MW th ). Experience shows, that an economic break even with oil is reached at an oil price of 30$ per barrel or if an adequate bonus for the clean, environmentally compatible production of geothermal heat is granted. Worldwide the installed electric capacity of geothermal power plants is approximately 6 000 MW e . About 15 000 MW th of thermal capacity is being extracted for process heat and space heat. The importance of the terrestrial heat as an energy resource would be substantially increased, if the heat, stored in the hot crystalline basement could be extracted at economical production costs. Geothermal energy is a competitive energy source in areas with high geothermal gradients (relative low cost for drilling) and would be competitive in areas with normal geothermal gradients, if a fair compensation for environmental implications from fossil and nuclear power production would be granted. (author) 2 figs., 1 tab., 6 refs

  14. Imperial County geothermal development annual meeting: summary

    Energy Technology Data Exchange (ETDEWEB)

    1983-01-01

    All phases of current geothermal development in Imperial County are discussed and future plans for development are reviewed. Topics covered include: Heber status update, Heber binary project, direct geothermal use for high-fructose corn sweetener production, update on county planning activities, Brawley and Salton Sea facility status, status of Imperial County projects, status of South Brawley Prospect 1983, Niland geothermal energy program, recent and pending changes in federal procedures/organizations, plant indicators of geothermal fluid on East Mesa, state lands activities in Imperial County, environmental interests in Imperial County, offshore exploration, strategic metals in geothermal fluids rebuilding of East Mesa Power Plant, direct use geothermal potential for Calipatria industrial Park, the Audubon Society case, status report of the Cerro Prieto geothermal field, East Brawley Prospect, and precision gravity survey at Heber and Cerro Prieto geothermal fields. (MHR)

  15. Geothermal systems: Principles and case histories

    Science.gov (United States)

    Rybach, L.; Muffler, L. J. P.

    The classification of geothermal systems is considered along with the geophysical and geochemical signatures of geothermal systems, aspects of conductive heat transfer and regional heat flow, and geothermal anomalies and their plate tectonic framework. An investigation of convective heat and mass transfer in hydrothermal systems is conducted, taking into account the mathematical modelling of hydrothermal systems, aspects of idealized convective heat and mass transport, plausible models of geothermal reservoirs, and preproduction models of hydrothermal systems. Attention is given to the prospecting for geothermal resources, the application of water geochemistry to geothermal exploration and reservoir engineering, heat extraction from geothermal reservoirs, questions of geothermal resource assessment, and environmental aspects of geothermal energy development. A description is presented of a number of case histories, taking into account the low enthalpy geothermal resource of the Pannonian Basin in Hungary, the Krafla geothermal field in Northeast Iceland, the geothermal system of the Jemez Mountains in New Mexico, and extraction-reinjection at the Ahuachapan geothermal field in El Salvador.

  16. Where is Argentina going in geothermal energy

    Energy Technology Data Exchange (ETDEWEB)

    Mange, J

    1977-01-01

    A brief review is given of geothermal exploration and development in Argentina. Methodical efforts to inventory the geothermal resources of the country were begun in 1974. The Commission set itself the task of locating the geothermal anomalies and then selecting particular anomalies for intensive exploration in order to confirm or discard the possibilities of exploiting the resource. The known principal anomalies are listed and the two selected for intensive exploration are indicated. (JSR)

  17. Technology under Astrbiology Science and Technology for Exploring Planets (ASTEP)

    Data.gov (United States)

    National Aeronautics and Space Administration — Future astrobiological research associated with Human and robotic solar system exploration requires the development of astrobiologically relevant, miniaturized...

  18. Digital Downsides: Exploring University Students' Negative Engagements with Digital Technology

    Science.gov (United States)

    Selwyn, Neil

    2016-01-01

    Digital technologies are now an integral feature of university study. As such, academic research has tended to concentrate on the potential of digital technologies to support, extend and even "enhance" student learning. This paper, in contrast, explores the rather more messy realities of students' engagements with digital technology. In…

  19. Washington: a guide to geothermal energy development

    Energy Technology Data Exchange (ETDEWEB)

    Bloomquist, R.G.; Basescu, N.; Higbee, C.; Justus, D.; Simpson, S.

    1980-06-01

    Washington's geothermal potential is discussed. The following topics are covered: exploration, drilling, utilization, legal and institutional setting, and economic factors of direct use projects. (MHR)

  20. Development of hot water utilizing power plants in fiscal 1999. Development of technology to collect geothermal resources in great depths (Development of technology to produce geothermal resources in great depths); 1999 nendo nessui riyo hatsuden plant nado kaihatsu seika hokokusho. Shinbu chinetsu shigen saishu gijutsu no kaihatsu / shinbu chinetsu shigen seisan gijutsu no kaihatsu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    With an objective to develop geothermal resources, research and development has been performed on the production technologies for the deep-seated geothermal resources, such as pressure, temperature, flow speed and density (PTSD) logging technologies. This paper summarizes the achievements in fiscal 1999. In the actual well test on the developed D-probe, it was verified that the probe operates normally under high temperature environment (342 degrees C) which exceeds the measurement limit of conductive cables (315 degrees C). In developing the PTC monitoring technology, the downhole sampler was improved, and a test was performed in the actual hole in the Hijiori area in Yamagata Prefecture. As a result, collection of hot water of about 900 mL has become possible. In developing the high-temperature tracer monitoring technology, simulation was performed keeping in mind charging the tracer into the Hijiori geothermal area, whereas specifications for charging and collecting the tracer were determined. In developing the scale monitoring technology, experiments were carried out on the fluid systems under deep geothermal conditions by using scale forming devices, by which it was indicated that silica is the important scale constituent. (NEDO)

  1. Final Report to DOE EERE – Geothermal Technologies Program Project Title: Monitoring and modeling of fluid flow in a developing enhanced geothermal system (EGS) reservoir

    Energy Technology Data Exchange (ETDEWEB)

    Fehler, Michael [Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

    2017-04-19

    The primary objective of this project was to improve our ability to predict performance of an Enhanced Geothermal System (EGS) reservoir over time by relating, in a quantitative manner, microseismic imaging with fluid and temperature changes within the reservoir. Historically, microseismic data have been used qualitatively to place bounds on the growth of EGS reservoirs created by large hydraulic fracturing experiments. Previous investigators used an experimentally based fracture opening relationship (fracture aperture as a function of pressure), the spatial extent of microseismic events, and some assumptions about fracture frequency to determine the size of an EGS reservoir created during large pumping tests. We addressed a number of issues (1) locating microearthquakes that occur during hydraulic fracturing, (2) obtaining more information about a reservoir than the microearthquake locations from the microearthquake data, for example, information about the seismic velocity structure of the reservoir or the scattering of seismic waves within the reservoir, (3) developing an improved methodology for estimating properties of fractures that intersect wellbores in a reservoir, and (4) developing a conceptual model for explaining the downward growth of observed seismicity that accompanies some hydraulic injections into geothermal reservoirs. We used two primary microseismic datasets for our work. The work was motivated by a dataset from the Salak Geothermal Field in Indonesia where seismicity accompanying a hydraulic injection was observed to migrate downward. We also used data from the Soultz EGS site in France. We also used Vertical Seismic Profiling data from a well in the United States. The work conducted is of benefit for characterizing reservoirs that are created by hydraulic fracturing for both EGS and for petroleum recovery.

  2. Uranium exploration: new thinking, new theories and new technologies

    International Nuclear Information System (INIS)

    Dai Jiemin

    2000-01-01

    Uranium prospecting and exploration in China have almost past a course of a half century. At the boundary of two centuries, what is the trend of uranium prospecting and exploration? The coming uranium prospecting and exploration will be dependent on the enlightenment of new thinking, the guidance of new theories and the support of new technologies and methods. In a word, the authors must set up a creation system for uranium prospecting and exploration. The above-mentioned ideas are discussed

  3. Generation by heated rock. Technology for hot dry rock geothermal power; Yakeishi ni mizu de hatsuden. Koon gantai hatsuden no gijutsu

    Energy Technology Data Exchange (ETDEWEB)

    Hori, Y. [Central Research Inst. of Electric Power Industry, Tokyo (Japan)

    1995-06-15

    Japan is one of the most distinguished volcanic country in the world and about 8% of the active volcanos of the world are distributed in Japan. This kind of a large quantity and natural energy resource near us are used as hot springs in the whole country and as for electricity in 10 geothermal power stations. In future, if this enormous underground geothermal energy could be utilized safely and economically by using new power generation system like hot dry rock geothermal power generation (HDR), it may contribute a little to the 21st century`s energy problem of Japan. Central Research Inst. of Electric Power Industry has installed `Okachi HDR testing ground` in Okachi-machi of Akita Ken, and is carrying out experiments since 1989. Hot dry rock geothermal power generation is a method in which water is injected to the hot dry rock and the thermal energy is recovered that the natural rock bed is used as a boiler. However, development of many new technologies is necessary to bring this system in practical use. 9 refs., 5 figs., 1 tab.

  4. Utilization of geothermal energy in the mining and processing of tungsten ore. Final report

    Energy Technology Data Exchange (ETDEWEB)

    Erickson, M.V.; Lacy, S.B.; Lowe, G.D.; Nussbaum, A.M.; Walter, K.M.; Willens, C.A.

    1981-01-01

    The engineering, economic, and environmental feasibility of the use of low and moderate temperature geothermal heat in the mining and processing of tungsten ore is explored. The following are covered: general engineering evaluation, design of a geothermal energy system, economics, the geothermal resource, the institutional barriers assessment, environmental factors, an alternate geothermal energy source, and alternates to geothermal development. (MHR)

  5. 1. expert congress on geothermal power: On the way to a new energy future. Proceedings; 1. Fachkongress Geothermischer Strom: Start in eine neue Energiezukunft. Tagungsband

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2003-07-01

    Subjects: The role of geothermal power in future energy supply; Efficient funding instruments for renewable energies; Geothermal resources for electric power generation (TAB study); From potential to utilisation: Concepts for geothermal power supply in Germany; Geothermal power in the German power supply system - comparative analysis of technologies, state of the art, marketing potential and experience so far; Exploration, development, construction and operation of the Neustadt-Glewe geothermal plant; Technical concept of the Neustadt-Glewe geothermal power plant; Predicting success of geothermal drilling; Seismic exploration, reservoir modelling and reservoir simulation in the context of the geothermal power project; Drilling technology and drilling cost for sediment rock and crystalline rock; Frac technology in crystalline rock; Frac technology in sediments; New technology MWD and LWD Systems Designed for Ultra-Deepwater and Geothermal Drilling; Further development of geothermal power generation in southern German crystalline rock; Efficiency of geothermal power generation; Dual heating station using medium-enthalpy geothermal water; The geothermal field on the Greek island of Milos: Current geothermal exploration and development; UGGW, the innovative concept for power generation independent of site; Russia's geothermal potential and its forecasted utilisation through 2020; On the learning curve to geothermal power: The Gross Schoenebeck in situ geothermal laboratory; Heat-resistant cements for deep drilling: Compositions, method of investigation, evaluation of results; Status and development of the Speyer geothermal project; Geothermal investigations accompanying construction of the Unterhaching geothermal plant; A power plant with an underground geothermal heat store; Investigation of a closed-circuit underground heat exchanger for environment-friendly supply of renewable energy independent of site - tools and energy conversion. (orig.) [German] Der

  6. Oilfield geothermal exploitation in China-A case study from the Liaohe oilfield in Bohai Bay Basin

    Science.gov (United States)

    Wang, Shejiao; Yao, Yanhua; Fan, Xianli; Yan, Jiahong

    2017-04-01

    , the heat demands of oilfield, and the exploration and development technologies, we discussed the potential of the oilfield geothermal energy development for the industrial and the civil applications in the future.

  7. Federal Geothermal Research Program Update Fiscal Year 1999

    Energy Technology Data Exchange (ETDEWEB)

    2004-02-01

    The Department of Energy (DOE) and its predecessors have conducted research and development (R&D) in geothermal energy since 1971. To develop the technology needed to harness the Nation's vast geothermal resources, DOE's Office of Geothermal and Wind Technologies oversees a network of national laboratories, industrial contractors, universities, and their subcontractors. The following mission and goal statements guide the overall activities of the Office of Geothermal and Wind Technologies. This Federal Geothermal Program Research Update reviews the specific objectives, status, and accomplishments of DOE's Geothermal Program for Federal Fiscal Year (FY) 1999. The information contained in this Research Update illustrates how the mission and goals of the Office of Geothermal and Wind Technologies are reflected in each R&D activity. The Geothermal Program, from its guiding principles to the most detailed research activities, is focused on expanding the use of geothermal energy.

  8. Supplement to the technical assessment of geoscience-related research for geothermal energy technology. Final report

    Energy Technology Data Exchange (ETDEWEB)

    1983-09-01

    Detailed information (e.g., project title, sponsoring organization, research area, objective status, etc.) is presented for 338 geoscience/geothermal related projects. A summary of the projects conducted by sponsoring organization is presented and an easy reference to obtain detailed information on the number and type of efforts being sponsored is presented. The projects are summarized by research area (e.g., volcanology, fluid inclusions, etc.) and an additional project cross-reference mechanism is also provided. Subsequent to the collection of the project information, a geosciences classification system was developed to categorize each project by research area (e.g., isotope geochemistry, heat flow studies) and by type of research conducted (e.g., theoretical research, modeling/simulation). A series of matrices is included that summarize, on a project-by-project basis, the research area addressed and the type of R and D conducted. In addition, a summary of the total number of projects by research area and R and D type is given.

  9. Assessing Space Exploration Technology Requirements as a First Step Towards Ensuring Technology Readiness for International Cooperation in Space Exploration

    Science.gov (United States)

    Laurini, Kathleen C.; Hufenbach, Bernhard; Satoh, Maoki; Piedboeuf, Jean-Claude; Neumann, Benjamin

    2010-01-01

    Advancing critical and enhancing technologies is considered essential to enabling sustainable and affordable human space exploration. Critical technologies are those that enable a certain class of mission, such as technologies necessary for safe landing on the Martian surface, advanced propulsion, and closed loop life support. Others enhance the mission by leading to a greater satisfaction of mission objectives or increased probability of mission success. Advanced technologies are needed to reduce mass and cost. Many space agencies have studied exploration mission architectures and scenarios with the resulting lists of critical and enhancing technologies being very similar. With this in mind, and with the recognition that human space exploration will only be enabled by agencies working together to address these challenges, interested agencies participating in the International Space Exploration Coordination Group (ISECG) have agreed to perform a technology assessment as an important step in exploring cooperation opportunities for future exploration mission scenarios. "The Global Exploration Strategy: The Framework for Coordination" was developed by fourteen space agencies and released in May 2007. Since the fall of 2008, several International Space Exploration Coordination Group (ISECG) participating space agencies have been studying concepts for human exploration of the moon. They have identified technologies considered critical and enhancing of sustainable space exploration. Technologies such as in-situ resource utilization, advanced power generation/energy storage systems, reliable dust resistant mobility systems, and closed loop life support systems are important examples. Similarly, agencies such as NASA, ESA, and Russia have studied Mars exploration missions and identified critical technologies. They recognize that human and robotic precursor missions to destinations such as LEO, moon, and near earth objects provide opportunities to demonstrate the

  10. Geothermal training at the International Institute of Geothermal Research in Pisa, Italy

    International Nuclear Information System (INIS)

    Dickson, M.H.; Fanelli, M.

    1990-01-01

    Between 1985 and 1990 the International School of Geothermics of Pisa has held 5 long-term courses, attended by 93 trainees. This paper reports that since 1970, when it began its activity, the Italian geothermal training center has prepared a total of 293 goethermists from 64 countries. Under its present structure the International School of Geothermics organizes short courses and seminars, along with the long-term courses directed mainly at geothermal exploration

  11. Geothermal progress monitor report No. 6

    Energy Technology Data Exchange (ETDEWEB)

    1982-06-01

    Geothermal Progress Monitor Report No. 6 presents a state-by-state summary of the status of geothermal leasing, exploration, and development in major physiographic regions where geothermal resource potential has been identified. Recent state-specific activities are reported at the end of each state status report, while recent activities of a more general nature are summarized briefly in Part II of the report. A list of recent publications of potential interest to the geothermal community and a directory of contributors to the geothermal progress monitoring system are also included.

  12. Geothermal Energy R&D Program Annual Progress Report Fiscal Year 1993

    Energy Technology Data Exchange (ETDEWEB)

    None

    1994-04-01

    In this report, the DOE Geothermal Program activities were split between Core Research and Industrial Development. The technical areas covered are: Exploration Technology, Drilling Technology, Reservoir Technology (including Hot Dry Rock Research and The Geyser Cooperation), and Conversion Technology (power plants, materials, and direct use/direct heat). Work to design the Lake County effluent pipeline to help recharge The Geysers shows up here for the first time. This Progress Report is another of the documents that are reasonable starting points in understanding many of the details of the DOE Geothermal Program. (DJE 2005)

  13. Geothermal energy

    International Nuclear Information System (INIS)

    Vuataz, F.-D.

    2005-01-01

    This article gives a general overview of the past and present development of geothermal energy worldwide and a more detailed one in Switzerland. Worldwide installed electrical power using geothermal energy sources amounts to 8900 MW el . Worldwide utilization of geothermal energy for thermal applications amounts to 28,000 MW th . The main application (56.5%) is ground-coupled heat pumps, others are thermal spas and swimming pools (17.7%), space heating (14.9%), heating of greenhouses (4.8%), fish farming (2.2%), industrial uses (1,8%), cooling and melting of snow (1.2%), drying of agricultural products (0.6 %). Switzerland has become an important user of geothermal energy only in the past 25 years. Earlier, only the exploitation of geothermal springs (deep aquifers) in Swiss thermal baths had a long tradition, since the time of the Romans. Today, the main use of geothermal energy is as a heat source for heat pumps utilizing vertical borehole heat exchangers of 50 to 350 meters length. 35,000 installations of this type with heating powers ranging from a few kW to 1000 kW already exist, representing the highest density of such installations worldwide. Other developments are geostructures and energy piles, the use of groundwater for heating and cooling, geothermal district heating, the utilization of draining water from tunnels and the project 'Deep Heat Mining' allowing the combined production of heat and electric power

  14. Geophysical considerations of geothermics

    Energy Technology Data Exchange (ETDEWEB)

    Hayakawa, M

    1967-01-01

    The development and utilization of geothermal energy is described from the standpoint of geophysics. The internal temperature of the Earth and the history and composition of magmas are described. Methods of exploration such as gravity, magnetic, thermal and electrical surveys are discussed, as are geochemical and infrared photogrammetric techniques. Examples are provided of how these techniques have been used in Italy and at the Matsukawa geothermal field in Japan. Drilling considerations such as muds, casings and cementing materials are discussed. Solutions are proposed for problems of environmental pollution and plant expansion.

  15. Geothermal Program Review IV: proceedings

    Energy Technology Data Exchange (ETDEWEB)

    1985-01-01

    The research and development program of DOE's Geothermal Technology Division is reviewed in separate presentations according to program area. Separate abstracts have been prepared for the individual papers. (ACR)

  16. Federal Geothermal Research Program Update - Fiscal Year 2001

    Energy Technology Data Exchange (ETDEWEB)

    Laney, P.T.

    2002-08-31

    This Federal Geothermal Program Research Update reviews the specific objectives, status, and accomplishments of DOE's Geothermal Program for Federal Fiscal Year (FY) 2001. The information contained in this Research Update illustrates how the mission and goals of the Office of Geothermal Technologies are reflected in each R&D activity. The Geothermal Program, from its guiding principles to the most detailed research activities, is focused on expanding the use of geothermal energy.

  17. Development of geothermal-well-completion systems. Final report

    Energy Technology Data Exchange (ETDEWEB)

    Nelson, E.B.

    1979-01-01

    Results of a three year study concerning the completion of geothermal wells, specifically cementing, are reported. The research involved some specific tasks: (1) determination of properties an adequate geothermal well cement must possess; (2) thorough evaluation of current high temperature oilwell cementing technology in a geothermal context; (3) basic research concerning the chemical and physical behavior of cements in a geothermal environment; (4) recommendation of specific cement systems suitable for use in a geothermal well.

  18. Geothermal industry assessment

    Energy Technology Data Exchange (ETDEWEB)

    1980-07-01

    An assessment of the geothermal industry is presented, focusing on industry structure, corporate activities and strategies, and detailed analysis of the technological, economic, financial, and institutional issues important to government policy formulation. The study is based principally on confidential interviews with executives of 75 companies active in the field. (MHR)

  19. Geothermal energy

    International Nuclear Information System (INIS)

    Lemale, J.

    2009-01-01

    The geothermal energy, listed among the new and renewable energy sources, is characterized by a huge variety of techniques and applications. This book deals with the access to underground geothermal resources and with their energy valorization as well. After a presentation of the main geological, hydrogeological and thermal exploitation aspects of this resource, the book presents the different geothermal-related industries in detail, in particular the district heating systems, the aquifer-based heat pumps, the utilizations in the agriculture, fishery and balneology sectors, and the power generation. (J.S.)

  20. Development of hot water utilizing power plants in fiscal 1999. Development of technology to collect geothermal resources in great depths/Development of technology to excavate geothermal resources in great depths (Designing whole development); 1999 nendo nessui riyo hatsuden plant nado kaihatsu seika hokokusho. Shinbu chinetsu shigen saishu gijutsu no kaihatsu / shinbu chinetsu shigen kussaku gijutsu no kaihatsu (zentai kaihatsu sekkei)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    Technological development has been made on excavation of geothermal wells, which are dense, hard, and high in temperature and pressure, in developing geothermal resources in great depths. This paper summarizes the achievements in fiscal 1999. This fiscal year has performed the excavation test using an actual well to verify the reliability in practical use of the developed heat-resistant and durable bit. The test was executed by using a bit with a diameter of 8-1/2 inches in a ground bet having a maximum temperature of 300 degrees C in the Yamakawa geothermal field. As a result, good site evaluation was obtained that the wear and tear after lift-up showed no problems, and sufficient performance was verified in the drilling rate and durability. In addition, the low specific gravity cement for high temperature use that has been newly developed was given a cement mixing test to identify its workability at site and hardening properties, at a test well with a temperature of about 40 degrees C in the Okiri geothermal field. The actual well test was performed in a large-scale lost water occurred in a return well during an excavation by Nittestu-Kagoshima Geothermal Company. Effects were recognized in measures to prevent water loss. (NEDO)

  1. Geothermal and environment

    International Nuclear Information System (INIS)

    1993-01-01

    The production of geothermal-electric energy, presents relatively few contamination problems. The two bigger problems associated to the geothermal production are the disposition of waste fluids and the discharges to the atmosphere of non-condensable gases as CO 2 , H 2 O and NH 3 . For both problems the procedures and production technologies exist, like it is the integral use of brines and gases cleaning systems. Other problems consist on the local impact to forest areas for the effect of the vapor discharge, the contamination for noise, the contamination of aquifer shallow and the contamination related with the construction and termination of wells

  2. Geosys. System analysis of the geothermal energy generation. Pt. A. Report. Pt. B. Extensive documentation of results; GeoSys. Systemanalyse der geothermalen Energieerzeugung. T. A. Synthesebericht. T. B. Ausfuehrliche Ergebnisdokumentation

    Energy Technology Data Exchange (ETDEWEB)

    Brasser, Thomas; Cannepin, Remi; Feige, Sebastian; Frieling, Gerd; Herbert, Horst-Juergen; Heinen, Christoffer; Strack, Christian; Vieten, Christoph

    2014-06-15

    The interdisciplinary system analysis on geothermal energy generation deals with the recent technological progress considering planning and exploration phases, construction test and operational phases and the decommissioning and dismantling of deep geothermal power generation facilities. Ecological aspects end effects on subjects of protection are taken into account including operational model calculations and probabilistic analyses of hypothetical operational situations.

  3. Exploring Challenges and Opportunities for Eco-Feedback Technology

    DEFF Research Database (Denmark)

    Verdezoto, Nervo

    This position paper explores challenges and opportunities for eco-feedback technology. Drawing on two design cases, I discuss the importance of supporting active participation as well as the articulation of work in everyday practices to facilitate reduction of consumption.......This position paper explores challenges and opportunities for eco-feedback technology. Drawing on two design cases, I discuss the importance of supporting active participation as well as the articulation of work in everyday practices to facilitate reduction of consumption....

  4. Geothermal heat pump

    International Nuclear Information System (INIS)

    Bruno, R.; Tinti, F.

    2009-01-01

    In recent years, for several types of buildings and users, the choice of conditioning by heat pump and low enthalpy geothermal reservoir has been increasing in the Italian market. In fact, such systems are efficient in terms of energy and consumption, they can perform, even at the same time, both functions, heating and cooling and they are environmentally friendly, because they do not produce local emissions. This article will introduce the technology and will focus on critical points of a geothermal field design, from actual practice, to future perspectives for the geo exchanger improvement. Finally, the article presents a best practice case in Bologna district, with an economic analysis showing the convenience of a geothermal heat pump. Conclusions of the real benefits of these plants can be drawn: compared to a non-negligible initial cost, the investment has a pay-back period almost always acceptable, usually less than 10 years. [it

  5. Subjects on geochemical technology for geothermal power plant. Chinetsu hatsudensho ni okeru kagaku kanri gijutsu ni kansuru shomondai. 1

    Energy Technology Data Exchange (ETDEWEB)

    Hirowatari, K [Kyushu Electric Power Co. Ltd., Fukuoka (Japan)

    1991-04-30

    This paper introduces the following technologies and countermeasures found to be successful in solving geochemical problems relating to the maintenance and management of geothermal power plants belonging to Kyushu Electric Power Co., Ltd. In controlling condensate properties,curtailment of pH fluctuation range by changing the injection point of NaOH,inactivation of sulphur bacteria by using chloramphenicol and prevention of slime loading of the condenser strainer by running of the cooling tower without make-up water were achieved. In the environmental countermeasures,it was concluded that Fe-ion injection method was most effective to remove As out of waste hot waters which are all reinjected into the underground formation now. By understanding the characteristics of the well eruption fluids,the attenuation mechanism of steam producing wells could be estimated, which were interference,re-eruption and degradation of the reservoir temperature caused by the reinjected hot waters. And the problems associated with the attenuation of steam producing wells have been solved fundamentally by taking proper countermeasures to eliminate the influence of reinjected hot waters. The atteunuation of reinjection well was found to be caused dominantly by silica loading at the permeable zone of wellbore and to be effectively solved by high temperature reinjection of the waste hot waters, controlling of temp. degradation of hot waters to be reinjected and prevention of air mixing. After applying proper countermeasures, the attunuation rate of the reinjection well has been fairly improved. 13 refs., 21 figs., 2 tabs.

  6. Exploring International Multicultural Field Experiences in Educational Technology

    Science.gov (United States)

    Wilder, Hilary; Ferris, Sharmila Pixy; An, Heejung

    2010-01-01

    Purpose: The purpose of this paper is to explore an online field experience between technology facilitator candidates in the USA and K-12 teachers in Namibia, to improve candidates' understanding of diversity and equity issues in the successful incorporation of information and communication technologies (ICT) in teaching and learning.…

  7. Exploring Experience of Runners with Sports Tracking Technology

    NARCIS (Netherlands)

    Kuru, Armagan

    2016-01-01

    Running has been perceived as an easy way of becoming physically active. Over time, amateur runners start to use technology to keep track of their training and be aware of their improvement. In that sense, this article explores runners’ experience with activity tracking technology. After giving a

  8. Study deep geothermal energy; Studie dypgeotermisk energi

    Energy Technology Data Exchange (ETDEWEB)

    Havellen, Vidar; Eri, Lars Sigurd; Andersen, Andreas; Tuttle, Kevin J.; Ruden, Dorottya Bartucz; Ruden, Fridtjof; Rigler, Balazs; Pascal, Christophe; Larsen, Bjoern Tore

    2012-07-01

    The study aims to analyze the potential energy with current technology, challenges, issues and opportunities for deep geothermal energy using quantitative analysis. It should especially be made to identify and investigate critical connections between geothermal potential, the size of the heating requirements and technical solutions. Examples of critical relationships may be acceptable cost of technology in relation to heating, local geothermal gradient / drilling depth / temperature levels and profitability. (eb)

  9. Technological change and petroleum exploration in the Gulf of Mexico

    International Nuclear Information System (INIS)

    Managi, Shunsuke; Opaluch, J.J.; Jin Di; Grigalunas, T.A.

    2005-01-01

    We examine the impact of technological change on oil and gas exploration in the Gulf of Mexico from 1947 to 1998, using a unique micro-data set. An index variable for technological change is constructed to capture both the number and significance of technological innovations in the offshore industry over the study period. Empirical models of exploration-discovery and of drilling cost are used to assess the effect of technological change at both the field level and the regional level. Our results indicate that technological change played a very significant role in the offshore industry over the past 50 years, increasing reserves and lowering cost. Although depletion effect was dominant over the first two decades, the effect of technological change was able to offset that of resource depletion over the entire 50-year study period

  10. A Comprehensive Tool for Exploring the Availability, Scalability and Growth Potential of Conventional and Renewable Energy Sources and Technologies

    Science.gov (United States)

    Jack-Scott, E.; Arnott, J. C.; Katzenberger, J.; Davis, S. J.; Delman, E.

    2015-12-01

    It has been a generational challenge to simultaneously meet the world's energy requirements, while remaining within the bounds of acceptable cost and environmental impact. To this end, substantial research has explored various energy futures on a global scale, leaving decision-makers and the public overwhelmed by information on energy options. In response, this interactive energy table was developed as a comprehensive resource through which users can explore the availability, scalability, and growth potentials of all energy technologies currently in use or development. Extensive research from peer-reviewed papers and reports was compiled and summarized, detailing technology costs, technical considerations, imminent breakthroughs, and obstacles to integration, as well as political, social, and environmental considerations. Energy technologies fall within categories of coal, oil, natural gas, nuclear, solar, wind, hydropower, ocean, geothermal and biomass. In addition to 360 expandable cells of cited data, the interactive table also features educational windows with background information on each energy technology. The table seeks not to advocate for specific energy futures, but to succinctly and accurately centralize peer-reviewed research and information in an interactive, accessible resource. With this tool, decision-makers, researchers and the public alike can explore various combinations of energy technologies and their quantitative and qualitative attributes that can satisfy the world's total primary energy supply (TPES) while making progress towards a near zero carbon future.

  11. The Distributed Geothermal Market Demand Model (dGeo): Documentation

    Energy Technology Data Exchange (ETDEWEB)

    McCabe, Kevin [National Renewable Energy Laboratory (NREL), Golden, CO (United States); Mooney, Meghan E [National Renewable Energy Laboratory (NREL), Golden, CO (United States); Sigrin, Benjamin O [National Renewable Energy Laboratory (NREL), Golden, CO (United States); Gleason, Michael [National Renewable Energy Laboratory (NREL), Golden, CO (United States); Liu, Xiaobing [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

    2017-11-06

    The National Renewable Energy Laboratory (NREL) developed the Distributed Geothermal Market Demand Model (dGeo) as a tool to explore the potential role of geothermal distributed energy resources (DERs) in meeting thermal energy demands in the United States. The dGeo model simulates the potential for deployment of geothermal DERs in the residential and commercial sectors of the continental United States for two specific technologies: ground-source heat pumps (GHP) and geothermal direct use (DU) for district heating. To quantify the opportunity space for these technologies, dGeo leverages a highly resolved geospatial database and robust bottom-up, agent-based modeling framework. This design is consistent with others in the family of Distributed Generation Market Demand models (dGen; Sigrin et al. 2016), including the Distributed Solar Market Demand (dSolar) and Distributed Wind Market Demand (dWind) models. dGeo is intended to serve as a long-term scenario-modeling tool. It has the capability to simulate the technical potential, economic potential, market potential, and technology deployment of GHP and DU through the year 2050 under a variety of user-defined input scenarios. Through these capabilities, dGeo can provide substantial analytical value to various stakeholders interested in exploring the effects of various techno-economic, macroeconomic, financial, and policy factors related to the opportunity for GHP and DU in the United States. This report documents the dGeo modeling design, methodology, assumptions, and capabilities.

  12. Technology for Increasing Geothermal Energy Productivity. Computer Models to Characterize the Chemical Interactions of Goethermal Fluids and Injectates with Reservoir Rocks, Wells, Surface Equiptment

    Energy Technology Data Exchange (ETDEWEB)

    Nancy Moller Weare

    2006-07-25

    This final report describes the results of a research program we carried out over a five-year (3/1999-9/2004) period with funding from a Department of Energy geothermal FDP grant (DE-FG07-99ID13745) and from other agencies. The goal of research projects in this program were to develop modeling technologies that can increase the understanding of geothermal reservoir chemistry and chemistry-related energy production processes. The ability of computer models to handle many chemical variables and complex interactions makes them an essential tool for building a fundamental understanding of a wide variety of complex geothermal resource and production chemistry. With careful choice of methodology and parameterization, research objectives were to show that chemical models can correctly simulate behavior for the ranges of fluid compositions, formation minerals, temperature and pressure associated with present and near future geothermal systems as well as for the very high PT chemistry of deep resources that is intractable with traditional experimental methods. Our research results successfully met these objectives. We demonstrated that advances in physical chemistry theory can be used to accurately describe the thermodynamics of solid-liquid-gas systems via their free energies for wide ranges of composition (X), temperature and pressure. Eight articles on this work were published in peer-reviewed journals and in conference proceedings. Four are in preparation. Our work has been presented at many workshops and conferences. We also considerably improved our interactive web site (geotherm.ucsd.edu), which was in preliminary form prior to the grant. This site, which includes several model codes treating different XPT conditions, is an effective means to transfer our technologies and is used by the geothermal community and other researchers worldwide. Our models have wide application to many energy related and other important problems (e.g., scaling prediction in petroleum

  13. Geothermal Small Business Workbook [Geothermal Outreach and Project Financing

    Energy Technology Data Exchange (ETDEWEB)

    Elizabeth Battocletti

    2003-05-01

    --the geothermal entrepreneur, small company, or project developer--step-by-step through the process needed to structure a business and financing plan for a small geothermal project; and Help you develop a financing plan that can be adapted and taken to potential financing sources. The Workbook will not: Substitute for financial advice; Overcome the high exploration, development, and financing costs associated with smaller geothermal projects; Remedy the lack of financing for the exploration stage of a geothermal project; or Solve financing problems that are not related to the economic soundness of your project or are caused by things outside of your control.

  14. Small Body Exploration Technologies as Precursors for Interstellar Robotics

    Energy Technology Data Exchange (ETDEWEB)

    Noble, Robert; /SLAC; Sykes, Mark V.; /PSI, Tucson

    2012-02-15

    The scientific activities undertaken to explore our Solar System will be the same as required someday at other stars. The systematic exploration of primitive small bodies throughout our Solar System requires new technologies for autonomous robotic spacecraft. These diverse celestial bodies contain clues to the early stages of the Solar System's evolution as well as information about the origin and transport of water-rich and organic material, the essential building blocks for life. They will be among the first objects studied at distant star systems. The technologies developed to address small body and outer planet exploration will form much of the technical basis for designing interstellar robotic explorers. The Small Bodies Assessment Group, which reports to NASA, initiated a Technology Forum in 2011 that brought together scientists and technologists to discuss the needs and opportunities for small body robotic exploration in the Solar System. Presentations and discussions occurred in the areas of mission and spacecraft design, electric power, propulsion, avionics, communications, autonomous navigation, remote sensing and surface instruments, sampling, intelligent event recognition, and command and sequencing software. In this paper, the major technology themes from the Technology Forum are reviewed, and suggestions are made for developments that will have the largest impact on realizing autonomous robotic vehicles capable of exploring other star systems.

  15. Development of production technology for deep-seated geothermal resources; Shinbu chinetsu shigen seisan gijutsu no kaihatsu gaiyo

    Energy Technology Data Exchange (ETDEWEB)

    Wada, T.; Akazawa, T. [New Energy and Industrial Technology Development Organization, Tokyo (Japan)

    1997-11-01

    In order to increase the geothermal power generation volume in Japan furthermore after now, it is necessary to develop the deep-seated geothermal fluid collecting technique at 3,000 to 4,000m in depth and about 350degC. In order to collect the deep-seated geothermal resources economically and effectively, there are some principally important problems on production techniques such as P (pressure)-T(temperature)-S (flow rate)-D (fluid density) logging technique, P (pressure)-T (temperature)-C (chemical composition) monitoring technique, high temperature tracer monitoring technique, scale monitoring technique, scale protection and removal technique and so on. The PTSD logging technique is a measuring technique for collecting some data necessary to conduct production management effectively. The PTC monitoring technique is a technique for collecting data on the geothermal resources essential for the resources evaluation and presumption, and tracer monitoring technique is a technique for collecting actual measurement data of fluid flow analysis in the deep-seated geothermal resources. And the sale monitoring is a technique for collecting data on various kinds of scale components of the deep-seated geothermal water and in the steam. In this paper, these techniques are summarized. 8 figs.

  16. Fiscal 1996 report on the results of the subsidy operation under the Sunshine Project on the development of a geothermal water use power plant, etc. Development of the deep geothermal resource collecting technology (development of the deep geothermal resource producing technology); 1996 nendo New Sunshine keikaku hojo jigyo seika hokokusho. Nessui riyo hatsuden plant nado kaihatsu (shinbu chinetsu shigen saishu gijutsu no kaihatsu / shinbu chinetsu shigen seisan gijutsu no kaihatsu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    The paper reported the results of the fiscal 1996 R and D of the deep geothermal resource collecting/producing technology. In the design of the total development, characteristics of the well mouth of the deep reservoir were examined to evaluate properties of deep geothermal resource, and the necessity of the pressure design, etc. were clarified. As to PTSD logging technology, conducted were improvement of PT probe, manufacture of a sonde of which S probe was integrated with memory/battery modules, and the actual well experiment. Concerning PTC monitoring technology, an experiment was carried out on a high temperature use optical fiber GI type, and it was shown that the type was on a commercial level. Further, a prototype sampler with 300degC heat resistance was trially manufactured, and a test to confirm its work was conducted in the well in the Corn Wall area of the U.K. As to the production control technology, studied was the arrangement of the production control technology for deep geothermal resource. Moreover, an experiment was made to examine the effect of metal ions coexisting when silica in the deep fluid precipitates. 46 refs., 107 figs., 38 tabs.

  17. Policy for geothermal energy development

    Energy Technology Data Exchange (ETDEWEB)

    Kiuchi, S [Public Utilities Bureau, Ministry of International Trade and Industry, Japan

    1973-01-01

    Government actions related to Japanese geothermal energy development in the past include: a mining and industrial research subsidy of 27 million yen granted to Kyushu Electric Power Co. in 1952, a mining and industrial research subsidy of 13 million yen granted to Japan Metals and Chemicals Co. in 1960, a study on steam production technology for geothermal power generation by Japan Metals and Chemicals Co. funded at 3.5 hundred million yen from the Research Development Corporation of Japan, and a study on steam production technology for large scale geothermal power generation by Japan Metals and Chemicals Co. funded at 7.6 hundred million yen by the Research Development Corporation of Japan. The following projects are planned by the Ministry of International Trade and Industry for 1973: a two-year geothermal power promotion including investigations into the utilization of hot water, new methods for geothermal reservoir detection and steam well drilling, and environmental effects, studies on hydrothermal systems, basic investigations for geothermal indicators in 30 areas, and a means to finance the construction of geothermal power plants in Kakkonda (Iwate Prefecture) and Hatchobara (Oita Prefecture).

  18. Colorado geothermal commercialization program. Geothermal energy opportunities at four Colorado towns: Durango, Glenwood Springs, Idaho Springs, Ouray

    Energy Technology Data Exchange (ETDEWEB)

    Coe, B.A.; Zimmerman, J.

    1981-01-01

    The potential of four prospective geothermal development sites in Colorado was analyzed and hypothetical plans prepared for their development. Several broad areas were investigated for each site. The first area of investigation was the site itself: its geographic, population, economic, energy demand characteristics and the attitudes of its residents relative to geothermal development potential. Secondly, the resource potential was described, to the extent it was known, along with information concerning any exploration or development that has been conducted. The third item investigated was the process required for development. There are financial, institutional, environmental, technological and economic criteria for development that must be known in order to realistically gauge the possible development. Using that information, the next concern, the geothermal energy potential, was then addressed. Planned, proposed and potential development are all described, along with a possible schedule for that development. An assessment of the development opportunities and constraints are included. Technical methodologies are described in the Appendix. (MHR)

  19. Nuclear power technology requirements for NASA exploration missions

    International Nuclear Information System (INIS)

    Bloomfield, H.S.

    1990-01-01

    This paper discusses how future exploration of the Moon and Mars will mandate developments in many areas of technology. In particular, major advances will be required in planet surface power systems and space transportation systems. Critical nuclear technology challenges that can enable strategic self-sufficiency, acceptable operational costs and cost-effective space transportation goals for NASA exploration missions have been identified. Critical technologies for surface power systems include stationary and mobile nuclear reactor and radio-isotope heat sources coupled to static and dynamic power conversion devices. These technologies can provide dramatic reductions in mass leading to operational and transportation cost savings. Critical technologies for space transportation systems include nuclear thermal rocket and nuclear electric propulsion options which present compelling concepts for significantly reducing mass, cost or travel time required for Earth-Mars transport

  20. Deep Geothermal Drilling Using Millimeter Wave Technology. Final Technical Research Report

    Energy Technology Data Exchange (ETDEWEB)

    Oglesby, Kenneth [Impact Technologies LLC, Tulsa, OK (United States); Woskov, Paul [MIT (Massachusetts Inst. of Technology), Cambridge, MA (United States); Einstein, Herbert [MIT (Massachusetts Inst. of Technology), Cambridge, MA (United States); Livesay, Bill [MIT (Massachusetts Inst. of Technology), Cambridge, MA (United States)

    2014-12-30

    Conventional drilling methods are very mature, but still have difficulty drilling through very deep,very hard and hot rocks for geothermal, nuclear waste entombment and oil and gas applications.This project demonstrated the capabilities of utilizing only high energy beams to drill such rocks,commonly called ‘Direct Energy Drilling’, which has been the dream of industry since the invention of the laser in the 1960s. A new region of the electromagnetic spectrum, millimeter wave (MMW) wavelengths at 30-300 giga-hertz (GHz) frequency was used to accomplish this feat. To demonstrate MMW beam drilling capabilities a lab bench waveguide delivery, monitoring and instrument system was designed, built and tested around an existing (but non-optimal) 28 GHz frequency, 10 kilowatt (kW) gyrotron. Low waveguide efficiency, plasma generation and reflected power challenges were overcome. Real-time monitoring of the drilling process was also demonstrated. Then the technical capability of using only high power intense millimeter waves to melt (with some vaporization) four different rock types (granite, basalt, sandstone, limestone) was demonstrated through 36 bench tests. Full bore drilling up to 2” diameter (size limited by the available MMW power) was demonstrated through granite and basalt samples. The project also demonstrated that MMW beam transmission losses through high temperature (260°C, 500oF), high pressure (34.5 MPa, 5000 psi) nitrogen gas was below the error range of the meter long path length test equipment and instruments utilized. To refine those transmission losses closer, to allow extrapolation to very great distances, will require a new test cell design and higher sensitivity instruments. All rock samples subjected to high peak temperature by MMW beams developed fractures due to thermal stresses, although the peak temperature was thermodynamically limited by radiative losses. Therefore, this limited drill rate and rock strength data were not able to be

  1. Blind Geothermal System Exploration in Active Volcanic Environments; Multi-phase Geophysical and Geochemical Surveys in Overt and Subtle Volcanic Systems, Hawai’i and Maui

    Energy Technology Data Exchange (ETDEWEB)

    Fercho, Steven [Ormat Nevada, Inc., Reno, NV (United States); Owens, Lara [Ormat Nevada, Inc., Reno, NV (United States); Walsh, Patrick [Ormat Nevada, Inc., Reno, NV (United States); Drakos, Peter [Ormat Nevada, Inc., Reno, NV (United States); Martini, Brigette [Corescan Inc., Ascot (Australia); Lewicki, Jennifer L. [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Kennedy, Burton M. [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

    2015-08-01

    Suites of new geophysical and geochemical exploration surveys were conducted to provide evidence for geothermal resource at the Haleakala Southwest Rift Zone (HSWRZ) on Maui Island, Hawai’i. Ground-based gravity (~400 stations) coupled with heli-bourne magnetics (~1500 line kilometers) define both deep and shallow fractures/faults, while also delineating potentially widespread subsurface hydrothermal alteration on the lower flanks (below approximately 1800 feet a.s.l.). Multi-level, upward continuation calculations and 2-D gravity and magnetic modeling provide information on source depths, but lack of lithologic information leaves ambiguity in the estimates. Additionally, several well-defined gravity lows (possibly vent zones) lie coincident with magnetic highs suggesting the presence of dike intrusions at depth which may represent a potentially young source of heat. Soil CO2 fluxes were measured along transects across geophysically-defined faults and fractures as well as young cinder cones along the HSWRZ. This survey generally did not detect CO2 levels above background, with the exception of a weak anomalous flux signal over one young cinder cone. The general lack of observed CO2 flux signals on the HSWRZ is likely due to a combination of lower magmatic CO2 fluxes and relatively high biogenic surface CO2 fluxes which mix with the magmatic signal. Similar surveys at the Puna geothermal field on the Kilauea Lower East Rift Zone (KLERZ) also showed a lack of surface CO2 flux signals, however aqueous geochemistry indicated contribution of magmatic CO2 and He to shallow groundwater here. As magma has been intercepted in geothermal drilling at the Puna field, the lack of measured surface CO2 flux indicative of upflow of magmatic fluids here is likely due to effective “scrubbing” by high groundwater and a mature hydrothermal system. Dissolved inorganic carbon (DIC) concentrations, δ13C compositions and 3He/4He values were sampled at Maui from several shallow

  2. Geothermal Program Review XII: proceedings. Geothermal Energy and the President's Climate Change Action Plan

    Energy Technology Data Exchange (ETDEWEB)

    1994-12-31

    Geothermal Program Review XII, sponsored by the Geothermal Division of US Department of Energy, was held April 25--28, 1994, in San Francisco, California. This annual conference is designed to promote effective technology transfer by bringing together DOE-sponsored researchers; utility representatives; geothermal energy developers; suppliers of geothermal goods and services; representatives from federal, state, and local agencies; and others with an interest in geothermal energy. In-depth reviews of the latest technological advancements and research results are presented during the conference with emphasis on those topics considered to have the greatest potential to impact the near-term commercial development of geothermal energy.

  3. Geothermal energy development in Turkey

    International Nuclear Information System (INIS)

    Simsek, S.; Okandan, E.

    1990-01-01

    Geothermal fields in Turkey are related to rather complex zones of collision between the Eurasian and African continents, and penetration of the Arabian plate into the Anatolian continental mass. These processes gave rise to fracturing of the lithosphere and eruption of magmas. Geothermal regional assessment studies have proven several low enthalpy sources and some high enthalpy fields suitable for electricity generation. This paper summarizes developments in exploration-drilling and give examples of direct utilization implemented in recent years

  4. 2014 Low-Temperature and Coproduced Geothermal Resources Fact Sheet

    Energy Technology Data Exchange (ETDEWEB)

    Tim Reinhardt, Program Manager

    2014-09-01

    As a growing sector of geothermal energy development, the Low-Temperature Program supports innovative technologies that enable electricity production and cascaded uses from geothermal resources below 300° Fahrenheit.

  5. Exploration Life Support Technology Development for Lunar Missions

    Science.gov (United States)

    Ewert, Michael K.; Barta, Daniel J.; McQuillan, Jeffrey

    2009-01-01

    Exploration Life Support (ELS) is one of NASA's Exploration Technology Development Projects. ELS plans, coordinates and implements the development of new life support technologies for human exploration missions as outlined in NASA's Vision for Space Exploration. ELS technology development currently supports three major projects of the Constellation Program - the Orion Crew Exploration Vehicle (CEV), the Altair Lunar Lander and Lunar Surface Systems. ELS content includes Air Revitalization Systems (ARS), Water Recovery Systems (WRS), Waste Management Systems (WMS), Habitation Engineering, Systems Integration, Modeling and Analysis (SIMA), and Validation and Testing. The primary goal of the ELS project is to provide different technology options to Constellation which fill gaps or provide substantial improvements over the state-of-the-art in life support systems. Since the Constellation missions are so challenging, mass, power, and volume must be reduced from Space Shuttle and Space Station technologies. Systems engineering analysis also optimizes the overall architecture by considering all interfaces with the life support system and potential for reduction or reuse of resources. For long duration missions, technologies which aid in closure of air and water loops with increased reliability are essential as well as techniques to minimize or deal with waste. The ELS project utilizes in-house efforts at five NASA centers, aerospace industry contracts, Small Business Innovative Research contracts and other means to develop advanced life support technologies. Testing, analysis and reduced gravity flight experiments are also conducted at the NASA field centers. This paper gives a current status of technologies under development by ELS and relates them to the Constellation customers who will eventually use them.

  6. Geothermal progress monitor: Report Number 19

    International Nuclear Information System (INIS)

    1997-12-01

    Short articles are presented related to activities in the federal government and the geothermal industry, international developments, state and local government activities, technology development, and technology transfer. Power plant tables and a directory of organizations involved in geothermal resource development are included

  7. Geothermal progress monitor: Report Number 19

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-12-01

    Short articles are presented related to activities in the federal government and the geothermal industry, international developments, state and local government activities, technology development, and technology transfer. Power plant tables and a directory of organizations involved in geothermal resource development are included.

  8. Geothermal Progress Monitor. Report No. 15

    Energy Technology Data Exchange (ETDEWEB)

    1993-12-01

    Two themes dominate this issue of the Geothermal Progress Monitor, the 15th since its inception in 1980. The first of these is the significance of the government/industry partnership role in geothermal development. This joint effort is reflected in the continued, measured growth in the use of geothermal energy, for both power generation and direct use applications, in this country and abroad, as well as in the development of new, innovative technologies to ensure a bright future for the resource. The second theme is the growing popularity of geothermal heat pumps (GHPs) among utilities, their customers, and federal agencies, all with disparate interests in the technology.

  9. "Assistance to States on Geothermal Energy"

    Energy Technology Data Exchange (ETDEWEB)

    Linda Sikkema; Jennifer DeCesaro

    2006-07-10

    NGC. The briefs addressed: Benefits of Geothermal Energy Common Questions about Geothermal Energy Geothermal Direct Use Geothermal Energy and Economic Development Geothermal Energy: Technologies and Costs Location of Geothermal Resources Geothermal Policy Options for States Guidelines for Siting Geothermal Power Plants and Electricity Transmission Lines

  10. Design A Prototype of Temperature Logging Tools for Geothermal Prospecting Areas

    Directory of Open Access Journals (Sweden)

    Supriyanto

    2013-08-01

    Full Text Available The costs of geothermal exploration are very high because technology is still imported from other countries. The local business players in the geothermal sector do not have the ability to compete with global companies. To reduce costs, we need to develop our own equipment with competitive prices. Here in Indonesia, we have started to design a prototype of temperature logging tools for geothermal prospecting areas. This equipment can be used to detect temperature versus depth variations. To measure the thermal gradient, the platinum resistor temperature sensor is moved slowly down along the borehole. The displacement along the borehole is measured by a rotary encoder. This system is controlled by a 16-bit H8/3069F microcontroller. The acquired temperature data is displayed on a PC monitor using a Python Graphical User Interface. The system has been already tested in the Gunung Pancar geothermal prospect area in Bogor.

  11. The dual role of external corporate venturing in technological exploration

    DEFF Research Database (Denmark)

    Li, Ying; van de Vrande, Vareska; Vanhaverbeke, Wim

    2009-01-01

    Innovating firms can not only explore new technologies from its innovation partners, but also explore new technologies from the organizations to which the innovating firm has had no prior relationships. Prior studies have mostly focused on a firm's exploratory learning from its venturing partners...... ("exploration from partners" or "EFP"). There has been little insight on how external corporate venturing may affect the exploratory learning beyond the venturing partnerships ("exploration beyond partners" or "EBP"). We claim that prior venturing relations have a dual role: First, the innovation firm can learn...... from knowledge embedded in its partners. Second, it can also learn from through its partners about knowledge developed by other firms or organizations with whom the innovating firm had no external venturing relations before. In this paper, we are interested how external corporate venturing partnerships...

  12. The state of exploitation of geothermal energy and some interesting achievements in geothermal research and development in the world

    Directory of Open Access Journals (Sweden)

    Dušan Rajver

    2016-08-01

    Full Text Available The article presents the latest status of geothermal energy use worldwide and the comparison with the previous period, both in electricity generation as well as in the various categories of direct use. Electricity production takes place in 26 countries and has at the end of 2014 reached 73,700 GWh from geothermal power plants with nearly 12.8 GW of installed power. This is still only 0.31 % of the total electricity produced in the world and it will be interesting to monitor the future share of geothermal energy in doing so. In the last 5-year period the development was particularly rapid in countries where it was slower in the past and, however, with favorable geological (tectonic conditions (Iceland, Kenya, New Zealand, Turkey, etc.. Direct use of geothermal energy covers a signifiant number of countries, today there are 82, although some of them are such where it takes place almost solely by geothermal (ground-source heat pumps (GHP on shallow subsurface energy (Finland. Installed capacity in the direct use is 70,885 MWt and geothermal energy used, including the GHP, is 592,638 TJ/year (end of 2014. Within the used energy the share of GHP dominates with 55.2 %, followed by the bathing and swimming pools complexes incl. balneology by 20.2 %, space heating by 15.0 % (the majority of it is district heating, heating of greenhouses and soil with 4.9 %, etc. The second part presents some interesting technological and scientifi innovations in exploration and exploitation of geothermal energy.

  13. Fiscal 1980 Sunshine Project research report. International cooperation project for energy technology. International research cooperation for geothermal energy (Japan-U.S. R and D cooperation for geothermal resource assessment); 1980 nendo energy gijutsu kokusai kyoryoku jigyo chinetsu energy kokusai kyoryoku seika hokokusho. Chinetsu shigen hyoka ni kansuru Nichibei kenkyu kaihatsu kyoryoku

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1981-03-01

    Based on the Japan-U.S. agreement on promotion of geothermal energy applications, the R and D cooperation specialist panel was held in America on March 12-20, 1981 to exchange the current R and D information on geothermal resources. It was clarified through the meeting in Department of Energy (DOE) that the U.S. budget was reduced by the Reagan Administration largely, resulting in delays in development of geothermal energy and construction of geothermal power plants. The following themes were discussed: Japanese and American geothermal development programs, DOE's industrialization activity, hot dry rock program, geoscience program, and geothermal prospecting technology program. It was clarified through the meeting in U.S. Geological Survey (USGS) that since the governmental resource assessment is made by USGS, however, wide data collection is made by other organizations generally, acquisition of data required for the assessment is difficult. Study on MOU is necessary together with fund allocation. Field survey was also made in Raft River, Cove Fort and Roosevelt. (NEDO)

  14. Fiscal 1980 Sunshine Project research report. International cooperation project for energy technology. International research cooperation for geothermal energy (Japan-U.S. R and D cooperation for geothermal resource assessment); 1980 nendo energy gijutsu kokusai kyoryoku jigyo chinetsu energy kokusai kyoryoku seika hokokusho. Chinetsu shigen hyoka ni kansuru Nichibei kenkyu kaihatsu kyoryoku

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1981-03-01

    Based on the Japan-U.S. agreement on promotion of geothermal energy applications, the R and D cooperation specialist panel was held in America on March 12-20, 1981 to exchange the current R and D information on geothermal resources. It was clarified through the meeting in Department of Energy (DOE) that the U.S. budget was reduced by the Reagan Administration largely, resulting in delays in development of geothermal energy and construction of geothermal power plants. The following themes were discussed: Japanese and American geothermal development programs, DOE's industrialization activity, hot dry rock program, geoscience program, and geothermal prospecting technology program. It was clarified through the meeting in U.S. Geological Survey (USGS) that since the governmental resource assessment is made by USGS, however, wide data collection is made by other organizations generally, acquisition of data required for the assessment is difficult. Study on MOU is necessary together with fund allocation. Field survey was also made in Raft River, Cove Fort and Roosevelt. (NEDO)

  15. Technology Clusters Exploration for Patent Portfolio through Patent Abstract Analysis

    Directory of Open Access Journals (Sweden)

    Gabjo Kim

    2016-12-01

    Full Text Available This study explores technology clusters through patent analysis. The aim of exploring technology clusters is to grasp competitors’ levels of sustainable research and development (R&D and establish a sustainable strategy for entering an industry. To achieve this, we first grouped the patent documents with similar technologies by applying affinity propagation (AP clustering, which is effective while grouping large amounts of data. Next, in order to define the technology clusters, we adopted the term frequency-inverse document frequency (TF-IDF weight, which lists the terms in order of importance. We collected the patent data of Korean electric car companies from the United States Patent and Trademark Office (USPTO to verify our proposed methodology. As a result, our proposed methodology presents more detailed information on the Korean electric car industry than previous studies.

  16. Geothermal energy for Hawaii: a prospectus

    Energy Technology Data Exchange (ETDEWEB)

    Yen, W.W.S.; Iacofano, D.S.

    1981-01-01

    An overview of geothermal development is provided for contributors and participants in the process: developers, the financial community, consultants, government officials, and the people of Hawaii. Geothermal energy is described along with the issues, programs, and initiatives examined to date. Hawaii's future options are explored. Included in appendices are: a technical glossary, legislation and regulations, a geothermal directory, and an annotated bibliography. (MHR)

  17. Overview of geothermal activities in Tunisia

    International Nuclear Information System (INIS)

    Ben Dhia, H.

    1990-01-01

    For Tunisia, the oil crisis and the decrease in local energy resources gave impetus to geothermal energy for potential assessment, exploration and utilization. Research undertaken showed a country with real potentialities either by its important deep aquifers or by the relatively high values of geothermal gradient and heat flow. This paper reports that it is expected that these efforts of geothermal investigation will continue in the future

  18. Results of the supplementary work to the fiscal 1994 New Sunshine Project. Development of geothermal power plants, etc. (development of production, technology for deep-seated geothermal resources); 1994 nendo new sunshine keikaku hojo jigyo seika hokokusho. Nessui riyo hatsuden plant to kaihatsu (shinbu chinetsu shigen saishu gijutsu no kaihatsu shinbu chinetsu shigen seisan gijutsu no kaihatsu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1995-03-01

    The paper reports on the fiscal 1994 results of the study of the development of a technology for collecting deep-seated geothermal resources, which has been made for increasing the capacity of the geothermal power generation as a part of the New Sunshine Project. As a plan for the development, a development is made of logging equipment and its auxiliary system and then characteristics of the deep-seated geothermal well are clarified. The logging equipment is a PTSD (pressure/temperature/spinner flow-meter/fluid density) logger which stands the use at deep-seated geothermal wells of 400{degree}C and 490 kgf/cm{sup 2} and measures pressure, temperature, flow rate and fluid density under static and dynamic conditions. In this fiscal year, metal seals were developed for preventing geothermal fluids from penetrating into the PT probe. Qualities and inner/outer diameters of various kinds of structural materials used in the S probe were determined, and output necessary enough to detect the rotation number is obtained. Measuring precision of D logging by {gamma} rays was evaluated. The study was made of the monitoring technology including the borehole and ground measuring system, the borehole fluid sampling and the scale formation. Relating to the tracer widely used in monitoring of hydrothermal reservoirs, investigated was the trend of the technology from abroad. 8 refs., 60 figs., 26 tabs.

  19. Geothermal energy conversion facility

    Energy Technology Data Exchange (ETDEWEB)

    Kutscher, C.F.

    1997-12-31

    With the termination of favorable electricity generation pricing policies, the geothermal industry is exploring ways to improve the efficiency of existing plants and make them more cost-competitive with natural gas. The Geothermal Energy Conversion Facility (GECF) at NREL will allow researchers to study various means for increasing the thermodynamic efficiency of binary cycle geothermal plants. This work has received considerable support from the US geothermal industry and will be done in collaboration with industry members and utilities. The GECF is being constructed on NREL property at the top of South Table Mountain in Golden, Colorado. As shown in Figure 1, it consists of an electrically heated hot water loop that provides heating to a heater/vaporizer in which the working fluid vaporizes at supercritical or subcritical pressures as high as 700 psia. Both an air-cooled and water-cooled condenser will be available for condensing the working fluid. In order to minimize construction costs, available equipment from the similar INEL Heat Cycle Research Facility is being utilized.

  20. The Historical Development of Vaccine Technology: Exploring the Relationship between Science and Technology

    Science.gov (United States)

    Lee, Yeung Chung; Kwok, Ping Wai

    2017-01-01

    This paper examines the feasibility of using historical case studies to contextualise the learning of the nature of science and technology in a biology lesson. Through exploring the historical development of vaccine technology, students were expected to understand the complexity of the relationships between technology and science beyond the…

  1. Exploring the influence of technology size on the duration of production technology transfer implementation

    NARCIS (Netherlands)

    Steenhuis, H.J.; de Bruijn, E.J.

    2005-01-01

    This study explores the relationship between technology size and installation time in technology transfer projects. A literature study revealed that the installation time has so far not received much attention. Current studies address the effectiveness of technology transfer rather than efficiency.

  2. NASA Technology Area 07: Human Exploration Destination Systems Roadmap

    Science.gov (United States)

    Kennedy, Kriss J.; Alexander, Leslie; Landis, Rob; Linne, Diane; Mclemore, Carole; Santiago-Maldonado, Edgardo; Brown, David L.

    2011-01-01

    This paper gives an overview of the National Aeronautics and Space Administration (NASA) Office of Chief Technologist (OCT) led Space Technology Roadmap definition efforts. This paper will given an executive summary of the technology area 07 (TA07) Human Exploration Destination Systems (HEDS). These are draft roadmaps being reviewed and updated by the National Research Council. Deep-space human exploration missions will require many game changing technologies to enable safe missions, become more independent, and enable intelligent autonomous operations and take advantage of the local resources to become self-sufficient thereby meeting the goal of sustained human presence in space. Taking advantage of in-situ resources enhances and enables revolutionary robotic and human missions beyond the traditional mission architectures and launch vehicle capabilities. Mobility systems will include in-space flying, surface roving, and Extra-vehicular Activity/Extravehicular Robotics (EVA/EVR) mobility. These push missions will take advantage of sustainability and supportability technologies that will allow mission independence to conduct human mission operations either on or near the Earth, in deep space, in the vicinity of Mars, or on the Martian surface while opening up commercialization opportunities in low Earth orbit (LEO) for research, industrial development, academia, and entertainment space industries. The Human Exploration Destination Systems (HEDS) Technology Area (TA) 7 Team has been chartered by the Office of the Chief Technologist (OCT) to strategically roadmap technology investments that will enable sustained human exploration and support NASA s missions and goals for at least the next 25 years. HEDS technologies will enable a sustained human presence for exploring destinations such as remote sites on Earth and beyond including, but not limited to, LaGrange points, low Earth orbit (LEO), high Earth orbit (HEO), geosynchronous orbit (GEO), the Moon, near

  3. Geothermal regimes of the Clearlake region, northern California

    Energy Technology Data Exchange (ETDEWEB)

    Amador, M. [ed.; Burns, K.L.; Potter, R.M.

    1998-06-01

    The first commercial production of power from geothermal energy, at The Geysers steamfield in northern California in June 1960, was a triumph for the geothermal exploration industry. Before and since, there has been a search for further sources of commercial geothermal power in The Geysers--Clear Lake geothermal area surrounding The Geysers. As with all exploration programs, these were driven by models. The models in this case were of geothermal regimes, that is, the geometric distribution of temperature and permeability at depth, and estimates of the physical conditions in subsurface fluids. Studies in microseismicity and heat flow, did yield geophysical information relevant to active geothermal systems. Studies in stable-element geochemistry found hiatuses or divides at the Stoney Creek Fault and at the Collayomi Fault. In the region between the two faults, early speculation as to the presence of steamfields was disproved from the geochemical data, and the potential existence of hot-water systems was predicted. Studies in isotope geochemistry found the region was characterized by an isotope mixing trend. The combined geochemical data have negative implications for the existence of extensive hydrothermal systems and imply that fluids of deep origin are confined to small, localized systems adjacent to faults that act as conduits. There are also shallow hot-water aquifers. Outside fault-localized systems and hot-water aquifers, the area is an expanse of impermeable rock. The extraction of energy from the impermeable rock will require the development and application of new methods of reservoir creation and heat extraction such as hot dry rock technology.

  4. Outline of the research and development of geothermal energy technology in the Sunshine Project

    Energy Technology Data Exchange (ETDEWEB)

    None

    1977-07-01

    In Japan most of the natural hydrothermal reservoirs developed for power generation, air conditioning, snow thawing and agricultural use are located at relatively shallow (1 to 2 km) depths. The number of operating plants in 1974 and 1975 was four, having a capacity of about 70 MW. Three plants were under construction which would provide an additional 150 MW. All use natural steam as the motive agent. If reservoirs at depths greater than 2 km are exploited the capacity for power generation would progressively increase. The development of exploration and drilling techniques has been advanced by the production of remote sensing and automatic drilling equipment capable of operation at 400/sup 0/C and 500 atm. Binary power generation turbine systems are under development and if successful it is predicted that Japanese generating capacity will reach 10 GW by the year 2000.

  5. Exploration des technologies de l'information et de la ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Exploration des technologies de l'information et de la communication au service ... IDRC “unpacks women's empowerment” at McGill University Conference ... a new funding opportunity aimed at fostering effective, long-term climate action to ...

  6. Young Pianists Exploring Improvisation Using Interactive Music Technology

    Science.gov (United States)

    Rowe, Victoria; Triantafyllaki, Angeliki; Anagnostopoulou, Xristina

    2015-01-01

    The use of music technology in the enhancement of young pianists' musical improvisations has been scarcely explored in instrumental music teaching and learning research. In the present study, 19 piano pupils aged 6-10 from the UK and Greece used an interactive improvisation system called Musical Interaction Relying On Reflexion (MIROR)-Impro for…

  7. Alaska: a guide to geothermal energy development

    Energy Technology Data Exchange (ETDEWEB)

    Basescu, N.; Bloomquist, R.G.; Higbee, C.; Justus, D.; Simpson, S.

    1980-06-01

    A brief overview is given of the geological characteristics of each region of the state as they relate to potential geothermal development. Those exploration methods which can lead to the siting of a deep exploration well are described. Requirements and techniques needed for drilling deeper higher temperature exploration and production wells are presented. Electrical generation, direct utilization, and indirect utilization are reviewed. Economic factors of direct use projects are presented. A general guide to the regulatory framework affecting geothermal energy development is provided. The general steps necessary to gain access to explore, develop, distribute, and use geothermal resources are outlined. (MHR)

  8. Washington: a guide to geothermal energy development

    Energy Technology Data Exchange (ETDEWEB)

    Bloomquist, R.G.; Basescu, N.; Higbee, C.; Justus, D.; Simpson, S.

    1980-01-01

    A brief overview is given of the geological characteristics of each region of the state as they relate to potential geothermal development. Those exploration methods which can lead to the siting of a deep exploration well are described. Requirements and techniques needed for drilling deeper higher temperature exploration and production wells are presented. Electrical generation, direct utilization, and indirect utilization are reviewed. Economic factors of direct use projects are presented. A general guide to the regulatory framework affecting geothermal energy development is provided. The general steps necessary to gain access to explore, develop, distribute, and use geothermal resources are outlined. (MHR)

  9. Exploring the evolution of investment pattern on advanced manufacturing technology

    DEFF Research Database (Denmark)

    Yang, Cheng; Matthiesen, Rikke Vestergaard; Johansen, John

    2014-01-01

    This paper explores the evolution of investment pattern on advanced manufacturing technology in a manner that builds on a longitudinal perspective. Based on the data of investments in AMTs from 567 manufacturing companies this paper develops a longitudinal taxonomy defined by the evolution of inv...... of technology management, which is comprised primarily of cross-sectional studies that do not address the dynamic nature of investments in AMTs.......This paper explores the evolution of investment pattern on advanced manufacturing technology in a manner that builds on a longitudinal perspective. Based on the data of investments in AMTs from 567 manufacturing companies this paper develops a longitudinal taxonomy defined by the evolution...... of investment patterns on AMT followed by companies over time; identifies the possible evolutionary features of different groups of companies; and suggests the possible explanatory and outcome factors on the evolution of investment pattern on AMTs. By doing so, this study seeks to fill a void in the area...

  10. Geothermal Permeability Enhancement - Final Report

    Energy Technology Data Exchange (ETDEWEB)

    Joe Beall; Mark Walters

    2009-06-30

    The overall objective is to apply known permeability enhancement techniques to reduce the number of wells needed and demonstrate the applicability of the techniques to other undeveloped or under-developed fields. The Enhanced Geothermal System (EGS) concept presented in this project enhances energy extraction from reduced permeability zones in the super-heated, vapor-dominated Aidlin Field of the The Geysers geothermal reservoir. Numerous geothermal reservoirs worldwide, over a wide temperature range, contain zones of low permeability which limit the development potential and the efficient recovery of heat from these reservoirs. Low permeability results from poorly connected fractures or the lack of fractures. The Enhanced Geothermal System concept presented here expands these technologies by applying and evaluating them in a systematic, integrated program.

  11. Federal Interagency Geothermal Activities

    Energy Technology Data Exchange (ETDEWEB)

    Anderson, Arlene [Office of Energy Efficiency and Renewable Energy (EERE), Washington, DC (United States); Prencipe, Loretta [Office of Energy Efficiency and Renewable Energy (EERE), Washington, DC (United States); Todaro, Richard M. [Office of Energy Efficiency and Renewable Energy (EERE), Washington, DC (United States); Cuyler, David [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Eide, Elizabeth [Office of Energy Efficiency and Renewable Energy (EERE), Washington, DC (United States)

    2011-06-01

    This collaborative document describes the roles and responsibilities of key Federal agencies in the development of geothermal technologies including the U.S. Department of Energy (DOE); the U.S. Department of Agriculture (USDA), including the U.S. Forest Service; the U.S. Department of Interior (DOI), including the United States Geological Survey (USGS) and Bureau of Land Management (BLM); the Environmental Protection Agency (EPA); and the Department of Defense (DOD).

  12. Proceedings of NEDO International Geothermal Symposium

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-11

    This is a proceedings of the NEDO International Geothermal Symposium held in Sendai in 1997. The worldwide geothermal energy power generation capacity exceeds 7000 MW. Geothermal energy is widely used also for heating, snow melting, greenhouse cultivation as well as electric power generation. Geothermal energy generates far less CO2 causing the global warming than fossil fuels. The geothermal energy is clean and renewable. Considering the environmental issue and energy supply/demand of the world, we have to exert further efforts for the geothermal development. In this conference, discussions were made on each country`s experiences of the geothermal development, and future prediction and strategies for geothermal utilization in the Asia/Pacific region, in particular. Further, in the technical session, conducted were the IEA study and technical presentation/discussion for technical cooperation. The proceedings includes research reports of more than 30, which are clarified into three fields: impacts of the geothermal development on the environment, technical development of the hot dry rock power generation system, and development of technology for collecting deep-seated geothermal resource

  13. Low-cost low-enthalpy geothermal heat for freshwater production: Innovative applications using thermal desalination processes

    KAUST Repository

    Bundschuh, Jochen

    2015-03-01

    The study is dedicated to exploring different types of low-cost low-enthalpy geothermal and their potential integration with conventional thermal-based water desalination and treatment technologies to deliver energy efficient, environmentally friendly solutions for water desalination and treatment, addressing global water crises. Our in-depth investigation through reviews of various low-enthalpy geothermal and conventional thermal-based technologies suggest that the geothermal option is superior to the solar option if low-cost geothermal heat is available because it provides a constant heat source in contrast to solar. Importantly, the stable heat source further allows up-scaling (> 1000 m3/day), which is not currently possible with solar. Solar-geothermal hybrid constellations may also be suitable in areas where both sources are available. The review also discovers that the innovative Membrane distillation (MD) process is very promising as it can be used for many different water compositions, salinity and temperature ranges. Either the geothermal water itself can be desalinated/treated or the geothermal heat can be used to heat feed water from other sources using heat exchangers. However, there are only few economic analyses for large-scale MD units and these are based on theoretical models using often uncertain assumptions resulting in a large variety of results.

  14. Low-cost low-enthalpy geothermal heat for freshwater production: Innovative applications using thermal desalination processes

    KAUST Repository

    Bundschuh, Jochen; Ghaffour, NorEddine; Mahmoudi, Hacè ne; Goosen, Mattheus F A; Mushtaq, Shahbaz; Hoinkis, Jan

    2015-01-01

    The study is dedicated to exploring different types of low-cost low-enthalpy geothermal and their potential integration with conventional thermal-based water desalination and treatment technologies to deliver energy efficient, environmentally friendly solutions for water desalination and treatment, addressing global water crises. Our in-depth investigation through reviews of various low-enthalpy geothermal and conventional thermal-based technologies suggest that the geothermal option is superior to the solar option if low-cost geothermal heat is available because it provides a constant heat source in contrast to solar. Importantly, the stable heat source further allows up-scaling (> 1000 m3/day), which is not currently possible with solar. Solar-geothermal hybrid constellations may also be suitable in areas where both sources are available. The review also discovers that the innovative Membrane distillation (MD) process is very promising as it can be used for many different water compositions, salinity and temperature ranges. Either the geothermal water itself can be desalinated/treated or the geothermal heat can be used to heat feed water from other sources using heat exchangers. However, there are only few economic analyses for large-scale MD units and these are based on theoretical models using often uncertain assumptions resulting in a large variety of results.

  15. Panel discussion on exploitation of geothermal resources in thermal zones

    Energy Technology Data Exchange (ETDEWEB)

    Viramonte, J G; Mange, J; Stefani, G

    1978-03-01

    The topics discussed include the major known geothermal resources, varying ways of exploiting geothermal resources, technical and economic difficulties in the exploitation, the place of geothermal energy in the total energy policy of a given country, advanced exploration techniques, and indications of needed areas of study. The panelists represented most of the South American countries, Mexico, and Italy. (JSR)

  16. Non-electrical uses of geothermal energy

    Energy Technology Data Exchange (ETDEWEB)

    Barber E.; Fanelli, M.

    1977-01-01

    A comprehensive review covers the recognition of natural hot fluids in ancient times and their use for therapeutic baths; the first production of electricity from geothermal steam at Larderello, Italy, in 1904; the widespread geographical occurrence of geothermal fluids; exploration techniques; the extraction of geothermal fluids and their uses in spas, agriculture, aquaculture, domestic heating, and industrial applications; geothermal greenhouse heating world-wide; geothermal heating of animal and poultry houses, in culture of alligators and crocodiles (in Atagawa, Japan), and in fish culture; piping arrangements for district heating, and a tabulation of district heating installations world-wide; downhole exchanger systems used in Klamath Falls, Oregon, for domestic heating; industrial heating applications; and methods of disposal of geothermal fluids. Maps, diagrams, graphs, photographs, tables, and 48 references are included.

  17. [Exploration of Recent Mobile Technologies Applied in Nursing Education].

    Science.gov (United States)

    Wu, Ting-Ting; Lu, Yi-Chen; Chang, Lei

    2017-12-01

    The development of science and technology has fundamentally changed people's lives and the way that medical systems function. Increasingly, mobile technologies are being introduced and integrated into classroom teaching and clinical applications, resulting in healthcare providers introducing innovative applications into health education. These applications enhance the clinical, education, and research expertise of medical staffs and nurses, while improving quality of care and providing new experiences for patients. In order to understand the current situation and trends in nursing education, the present study adopted literature analysis to explore the influence and effect of mobile technologies that have been introduced into nursing education from the school and clinical environments. The results found that students hold positive attitudes toward introducing these technologies into their curricula. Although these technologies may increase the work efficiency of nurses in the workplace, questions remain user perceptions and professional expression. Therefore, securing patient agreement and healthcare system approval were major turning points in the introduction of mobile technologies into nursing education. In the future, adapting mobile technologies for use in teaching materials and courses may be further developed. Moreover, empirical studies may be used in future research in order to facilitate the increasingly successful integration of relevant technologies into nursing education.

  18. Geothermal progress monitor. Progress report No. 4

    Energy Technology Data Exchange (ETDEWEB)

    1980-09-01

    The following are included: geothermal power plants proposed and on-line; direct heat applications proposed and operational; trends in drilling activities; exploration; leases; outreach and technical assistance; feasibility studies and application demonstrations; geothermal loan guaranty program; research and development activities; legal, institutional, and regulatory activities; environmental activities; reports and publications; and a directory. (MHR)

  19. FY 1994 Report on the feasibility study results of the geothermal exploitation technologies for the international joint demonstration research; 1994 nendo chinetsu tansa gijutsu no kaigai kyodo jissho kenkyu kanosei chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1995-03-01

    Described herein are the FY 1994 results of the feasibility study of the geothermal exploitation technologies for the international joint demonstration research with Indonesia. The survey methods are considered for the areas difficult to access by land transportation means (e.g., tropical rain forests) to promote development of geothermal resources in remote areas (small- to medium-scale geothermal power generation plans). The satellite and air remote sensing are used for the wide-area survey. The data obtained by the satellite are analyzed using the JERS-1 data, and then surveyed in detail by the air remote sensing for the selected areas to find, e.g., abnormal ground temperature regions, faults, volcanoes, geothermally altered regions and landslide regions. They are surveyed in more detail by the air electromagnetic and magnetic exploitation methods. Although they have high resolution, their application tends to be hindered by hot and humid climates in the prospective exploitation areas. The GEMS-aided resources analysis is used to establish the geothermal models, to help extract the promising areas. These techniques are basically common, but it is necessary to take into consideration, e.g., the environments and regional characteristics of these areas when they are actually used. Diversification of fossil fuel supply sources is advantageous for Japan, and her energy security will be improved by supporting geothermal resources development promotion in the supply sources. (NEDO)

  20. The National Geothermal Energy Research Program

    Science.gov (United States)

    Green, R. J.

    1974-01-01

    The continuous demand for energy and the concern for shortages of conventional energy resources have spurred the nation to consider alternate energy resources, such as geothermal. Although significant growth in the one natural steam field located in the United States has occurred, a major effort is now needed if geothermal energy, in its several forms, is to contribute to the nation's energy supplies. From the early informal efforts of an Interagency Panel for Geothermal Energy Research, a 5-year Federal program has evolved whose objective is the rapid development of a commercial industry for the utilization of geothermal resources for electric power production and other products. The Federal program seeks to evaluate the realistic potential of geothermal energy, to support the necessary research and technology needed to demonstrate the economic and environmental feasibility of the several types of geothermal resources, and to address the legal and institutional problems concerned in the stimulation and regulation of this new industry.

  1. DMRC studies geothermal energy options

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2008-03-01

    The Deep Mining Research Consortium (DMRC) is an industry-led research consortium that includes Vale Inco, Xstrata, Rio Tinto, Goldcorp, Agnico-Eagle, Barrick Gold, CANMET and the City of Sudbury. This article reported on the application of geothermal energy technologies to cool deep mine workings and use the heat from underground to produce energy to heat surface buildings. Researchers at the University of British Columbia's Centre for Environmental Research in Minerals, Metals and Materials have proposed the use of heat pumps and water-to-air heat exchangers at depth to chill mine workings. The heat pumps would act as refrigerators, taking heat from one area and moving it elsewhere. The purpose would be to extract heat from naturally occurring ground water and pass the chilled water through a heat exchanger to cool the air. The heated water would then be pumped to surface and used to heat surface facilities. The technology is well suited for using geothermal energy from decommissioned mines for district heating. The technology has been successfully used in Spring Hill, Nova Scotia, where geothermal energy from a decommissioned coal mine is used to heat an industrial park. A feasibility study is also underway for the city of Yellowknife in the Northwest Territories to produce up to 10 megawatts of heat from the Con Gold Mine, enough energy to heat half of Yellowknife. Geothermal energy can also be used to generate electricity, particularly in the Pacific Rim where underground temperatures are higher and closer to surface. In Sudbury Ontario, the enhanced geothermal systems technology would require two holes drilled to a depth of four kilometers. The ground between the two holes should be fractured to create an underground geothermal circuit. Geothermal energy does not produce any greenhouse gases or chemical wastes. 1 fig.

  2. FY 2000 report on the survey for extraction of areas promising in strategic exploration geothermal development. Kirishima region; 2000 nendo senryakuteki chosa chinetsu kaihatsu yubo chiiki chushutsu chosa hokokusho. Kirishima chiiki

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    An investigational study was conducted for the Kirishima region with the aim of contributing to working out future medium- and long-term plans of geothermal development promotion survey, estimation of the developmental resource amount, extraction of technology development subjects effectively connecting to the increase in kW, etc. In the study, literature is collected such as reports of the surveys already made in the Kirishima region and the periphery, the data were re-analyzed and divided into geological structure elements and geological structure elements, and a conceptual model of the geothermal system in the whole Kirishima region was made. As a result, two areas were extracted for which the existence of high temperature geothermal reservoirs is expected. The total resource amount was estimated at 2,785MWe at promising area 1 and at 3,237MWe at promising area 2. With the resource amount density, data likelihood and distribution status of national/quasi-national parks as extraction criteria, 6 out of these promising areas were focused on important areas for survey. Geothermal structure models were made for each of the 6 areas, and the evaluation of the resource amount using evaluation assist tools was carried out. (NEDO)

  3. Geothermal probabilistic cost study

    Energy Technology Data Exchange (ETDEWEB)

    Orren, L.H.; Ziman, G.M.; Jones, S.C.; Lee, T.K.; Noll, R.; Wilde, L.; Sadanand, V.

    1981-08-01

    A tool is presented to quantify the risks of geothermal projects, the Geothermal Probabilistic Cost Model (GPCM). The GPCM model is used to evaluate a geothermal reservoir for a binary-cycle electric plant at Heber, California. Three institutional aspects of the geothermal risk which can shift the risk among different agents are analyzed. The leasing of geothermal land, contracting between the producer and the user of the geothermal heat, and insurance against faulty performance are examined. (MHR)

  4. Electric utility companies and geothermal power

    Science.gov (United States)

    Pivirotto, D. S.

    1976-01-01

    The requirements of the electric utility industry as the primary potential market for geothermal energy are analyzed, based on a series of structured interviews with utility companies and financial institution executives. The interviews were designed to determine what information and technologies would be required before utilities would make investment decisions in favor of geothermal energy, the time frame in which the information and technologies would have to be available, and the influence of the governmental politics. The paper describes the geothermal resources, electric utility industry, its structure, the forces influencing utility companies, and their relationship to geothermal energy. A strategy for federal stimulation of utility investment in geothermal energy is suggested. Possibilities are discussed for stimulating utility investment through financial incentives, amelioration of institutional barriers, and technological improvements.

  5. Pipe Explorer{trademark} surveying system. Innovative technology summary report

    Energy Technology Data Exchange (ETDEWEB)

    1999-06-01

    The US Department of Energy`s (DOE) Chicago Operations Office and the DOE`s Federal Energy Technology Center (FETC) developed a Large Scale Demonstration Project (LSDP) at the Chicago Pile-5 Research Reactor (CP-5) at Argonne National Laboratory-East (ANL). The objective of the LSDP is to demonstrate potentially beneficial decontamination and decommissioning (D and D) technologies in comparison with current baseline technologies. The Pipe Explorer{trademark} system was developed by Science and Engineering Associates, Inc. (SEA), Albuquerque, NM as a deployment method for transporting a variety of survey tools into pipes and ducts. Tools available for use with the system include alpha, beta and gamma radiation detectors; video cameras; and pipe locator beacons. Different versions of this technology have been demonstrated at three other sites; results of these demonstrations are provided in an earlier Innovative Technology Summary Report. As part of a D and D project, characterization radiological contamination inside piping systems is necessary before pipes can be recycled, remediated or disposed. This is usually done manually by surveying over the outside of the piping only, with limited effectiveness and risk of worker exposure. The pipe must be accessible to workers, and embedded pipes in concrete or in the ground would have to be excavated at high cost and risk of exposure to workers. The advantage of the Pipe Explorer is its ability to perform in-situ characterization of pipe internals.

  6. Pipe Explorer surveying system. Innovative technology summary report

    International Nuclear Information System (INIS)

    1999-06-01

    The US Department of Energy's (DOE) Chicago Operations Office and the DOE's Federal Energy Technology Center (FETC) developed a Large Scale Demonstration Project (LSDP) at the Chicago Pile-5 Research Reactor (CP-5) at Argonne National Laboratory-East (ANL). The objective of the LSDP is to demonstrate potentially beneficial decontamination and decommissioning (D and D) technologies in comparison with current baseline technologies. The Pipe Explorer trademark system was developed by Science and Engineering Associates, Inc. (SEA), Albuquerque, NM as a deployment method for transporting a variety of survey tools into pipes and ducts. Tools available for use with the system include alpha, beta and gamma radiation detectors; video cameras; and pipe locator beacons. Different versions of this technology have been demonstrated at three other sites; results of these demonstrations are provided in an earlier Innovative Technology Summary Report. As part of a D and D project, characterization radiological contamination inside piping systems is necessary before pipes can be recycled, remediated or disposed. This is usually done manually by surveying over the outside of the piping only, with limited effectiveness and risk of worker exposure. The pipe must be accessible to workers, and embedded pipes in concrete or in the ground would have to be excavated at high cost and risk of exposure to workers. The advantage of the Pipe Explorer is its ability to perform in-situ characterization of pipe internals

  7. NASA's Solar System Exploration Research Virtual Institute: Science and Technology for Lunar Exploration

    Science.gov (United States)

    Schmidt, Greg; Bailey, Brad; Gibbs, Kristina

    2015-01-01

    The NASA Solar System Exploration Research Virtual Institute (SSERVI) is a virtual institute focused on research at the intersection of science and exploration, training the next generation of lunar scientists, and development and support of the international community. As part of its mission, SSERVI acts as a hub for opportunities that engage the larger scientific and exploration communities in order to form new interdisciplinary, research-focused collaborations. The nine domestic SSERVI teams that comprise the U.S. complement of the Institute engage with the international science and exploration communities through workshops, conferences, online seminars and classes, student exchange programs and internships. SSERVI represents a close collaboration between science, technology and exploration enabling a deeper, integrated understanding of the Moon and other airless bodies as human exploration moves beyond low Earth orbit. SSERVI centers on the scientific aspects of exploration as they pertain to the Moon, Near Earth Asteroids (NEAs) and the moons of Mars, with additional aspects of related technology development, including a major focus on human exploration-enabling efforts such as resolving Strategic Knowledge Gaps (SKGs). The Institute focuses on interdisciplinary, exploration-related science focused on airless bodies targeted as potential human destinations. Areas of study represent the broad spectrum of lunar, NEA, and Martian moon sciences encompassing investigations of the surface, interior, exosphere, and near-space environments as well as science uniquely enabled from these bodies. This research profile integrates investigations of plasma physics, geology/geochemistry, technology integration, solar system origins/evolution, regolith geotechnical properties, analogues, volatiles, ISRU and exploration potential of the target bodies. New opportunities for both domestic and international partnerships are continually generated through these research and

  8. Assessment of Geothermal Data Resources and Requirements

    Energy Technology Data Exchange (ETDEWEB)

    none,

    2008-09-01

    This paper is a review of Geothermal Technologies Program activities and archives related to data collection and analysis. It includes an assessment of the current state of geothermal data, future program and stakeholder data needs, existence of and access to critical data, and high-level direction and prioritization of next steps to meet the Program’s data needs.

  9. Geothermal Money Book [Geothermal Outreach and Project Financing

    Energy Technology Data Exchange (ETDEWEB)

    Elizabeth Battocletti

    2004-02-01

    Small business lending is big business and growing. Loans under $1 million totaled $460 billion in June 2001, up $23 billion from 2000. The number of loans under $100,000 continued to grow at a rapid rate, growing by 10.1%. The dollar value of loans under $100,000 increased 4.4%; those of $100,000-$250,000 by 4.1%; and those between $250,000 and $1 million by 6.4%. But getting a loan can be difficult if a business owner does not know how to find small business-friendly lenders, how to best approach them, and the specific criteria they use to evaluate a loan application. This is where the Geothermal Money Book comes in. Once a business and financing plan and financial proposal are written, the Geothermal Money Book takes the next step, helping small geothermal businesses locate and obtain financing. The Geothermal Money Book will: Explain the specific criteria potential financing sources use to evaluate a proposal for debt financing; Describe the Small Business Administration's (SBA) programs to promote lending to small businesses; List specific small-business friendly lenders for small geothermal businesses, including those which participate in SBA programs; Identify federal and state incentives which are relevant to direct use and small-scale (< 1 megawatt) power generation geothermal projects; and Provide an extensive state directory of financing sources and state financial incentives for the 19 states involved in the GeoPowering the West (GPW). GPW is a U.S. Department of Energy-sponsored activity to dramatically increase the use of geothermal energy in the western United States by promoting environmentally compatible heat and power, along with industrial growth and economic development. The Geothermal Money Book will not: Substitute for financial advice; Overcome the high exploration, development, and financing costs associated with smaller geothermal projects; Remedy the lack of financing for the exploration stage of a geothermal project; or Solve

  10. The geothermal KWh cost

    International Nuclear Information System (INIS)

    Anon.

    1995-01-01

    Numerous factors can influence the cost of geothermal electricity production: the size and power of production units, the conversion technology used (Rankine cycle or water steam), the resource quality (dry vapor or water-vapor mixing), the resource depth, the drilling activity in the country and the work people costs. In the United States of America the geothermal kWh cost ranges from 2.5 to 8.5 US cents, while in Italy and Nicaragua it ranges from 3 and 10 cents and from 5.7 to 6 cents, respectively. Results of a comparative study of the kWh production cost from different energy sources is also summarized. (J.S.). 1 tab

  11. Geothermal energy

    Energy Technology Data Exchange (ETDEWEB)

    Gasparovic, N

    1962-07-01

    Live steam, transformed steam, and steam produced by expansion flashing are outlined with respect to their use in the production of electricity. The capacity, pressure, and temperature of a steam must be determined empirically by exploratory drilling. These factors are dependent on time and on the extent of nearby drilling-activity. Particulars of geothermal-steam power-plants such as steam dryness, hot-water flashing, condensation, gas extraction, and corrosion are discussed in detail. All available data (as per 1962) concerning the costs of operation and construction of geothermal power plants are tabulated. For space-heating purposes, two basic systems are utilized. When little corrosion or precipitation is expected, an open system is used, otherwise, closed systems are necessary. The space-heating system of Reykjavik, Iceland is cited as an example. A brief description of industrial applications of geothermal energy, such as the extraction of NaCl, D/sub 2/O, or boric acid, is provided. Thirty-two references are given.

  12. Exploring private consumers’ willingness to adopt Smart Grid technology

    DEFF Research Database (Denmark)

    Toft, Madeleine Broman; Thøgersen, John

    2015-01-01

    it involves behavioural changes. There is a need to get more insight into who are willing to adopt SGT and why. This study draws on innovation adoption theory as a framework for understanding consumer adoption of this new technology. We explore whether consumers who have already adopted other types of new......The goal of radically increasing the proportion of electricity generated from renewable sources puts the current electrical grid under pressure and one of the solutions is to turn the grid into a ‘Smart Grid’. One of the key elements of the Smart Grid is that electricity consumers make some...... of their consumption available as flexible capacity to balance the grid. Consumers’ flexible capacity is only available to the grid if the consumers adopt Smart Grid technology (SGT) that establishes the link between the electric system and the consumer. This technology is new to private consumers and using...

  13. Status of geothermal resources in Mexico

    International Nuclear Information System (INIS)

    Le-Bert, G.

    1990-01-01

    Except for some isolated instances with tourist or therapeutic objectives and some attempts in the Cerro Prieto geothermal field, there are no projects for direct heat utilization of geothermal resources in Mexico. Therefore, all places that are studied are studied with geothermal-electric objectives. It is convenient to keep in mind that in Mexico, by law, the Comision Federal de Electricidad (CFE) is the public utility in charge of electrical energy service. This institution is directly responsible for the exploration, development and commercial use of geothermal energy for electrical generation. Therefore, this paper includes the present and planned exploration and utilization of geothermal resources only for electricity generation for the period 1985 to the present. Likewise, starting 5 years ago, the CFE efforts have been directed toward the development of high enthalpy fields

  14. Utilisation of prompt fission neutron technology in Greenfields uranium exploration

    International Nuclear Information System (INIS)

    Mutz, P.R.

    2007-01-01

    Conventionally, gamma detection technology has been used in uranium exploration programs for the initial detection of uranium as well as for a determination of uranium concentration. Geophysical logging companies use wireline gamma probes to measure uranium within boreholes, and field technicians utilise hand held gamma meters to detect uranium in rock samples, drill cuttings and cores. Borehole geophysical logging equipment typically records the uranium concentration as %eU 3 O8, where e represents an equivalent determination of uranium concentration as opposed to a laboratory assay. This method of uranium determination is an indirect method, as it measures gamma radiation from uranium-238 (U-238) isotope decay chain progeny; principally the bismuth-214 (Bi-214) isotope. Consequently, the uranium determination can be inaccurate due to natural disequilibrium between the U-238 parent and the decay chain progeny. This is especially true in sedimentary hosted uranium deposits, where the uranium and daughter progeny may have been geochemically separated. The gamma detection method for uranium can also be rendered inaccurate by detecting the gamma signature from potassium in clays as well as from thorium; both of which can provide a false (enhanced) eU 3 O8 determination. Prompt Fission Neutron (PFN) technology is a geophysical wireline logging technology used in the same manner as conventional gamma logging. The difference is that PFN provides a direct determination of uranium within a borehole, irrespective of natural disequilibrium or the presence of other radioactive elements. This paper provides a brief description of natural uranium and radioactivity as a basis for explaining the conventional use of gamma radiation detectors for the detection and determination of uranium concentration in exploration boreholes, including the potential pitfalls of this technology. A detailed description of prompt fission neutron technology is also presented, along with a discussion

  15. Status on high enthalpy geothermal resources in Greece

    International Nuclear Information System (INIS)

    Koutinas, G.A.

    1990-01-01

    Greece is privileged to have many high and medium enthalpy geothermal resources. Related activities during the last 5 years were conducted mainly on the previously discovered geothermal fields of Milos, Nisyros and Lesvos islands, without any deep geothermal drilling. Most efforts were focused on the demonstration of a high enthalpy geothermal reservoir on Milos, by generating electricity from high salinity fluid, with a 2 MW pilot plant. Significant experience has been gained there, by solving technical problems, but still site specific constraints have to be overcome in order to arrive at a comprehensive feasibility study, leading to the development phase. A pre-feasibility study has been carried out in the Nisyros geothermal field. Moreover, a detailed geoscientific exploration program has been completed on Lesvos island, where very promising geothermal areas have been identified. In this paper, reference is made to the most important data concerning high enthalpy geothermal resources by emphasizing the Milos geothermal field

  16. Fiscal 1996 verification and survey of geothermal prospecting technology etc. 2/2. Survey report on deep-seated geothermal resources; 1996 nendo chinetsu tansa gijutsu nado kensho chosa hokokusho. 2/2. Shinbu chinetsu shigen chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    For the purpose of reducing the risk to accompany the exploitation of deep-seated geothermal resources, investigations are conducted into the three factors that govern the formation of geothermal resources at deep levels, that is, the supply of heat from heat sources, the supply of geothermal fluids, and the development of fracture systems contributing to the constitution of reservoir structures. In the study of deep-seated geothermal models for the Kakkonda area, a reservoir structure model, a thermal structure model, and a geothermal fluid/hydraulic structure model are deliberated. Then, after studying the relations of the said three structure models to fracture systems, the boundary between the geothermal fluid convection region and the thermal conduction region near the 3,100m-deep level, the existence of high-salinity fluids and the depth of gas inflow, the ranges of shallow-seated reservoirs and deep-seated reservoirs, the trend of reduction in reservoir pressure and the anisotropy in water permeability in shallow-seated reservoirs, etc., a latest reservoir model is constructed into which all the findings obtained so far are incorporated. As for guidelines for deep-seated thermal resources survey and development, it is so decided that deep-seated geothermal survey guidelines, deep-seated fluid production guidelines, and deep-seated well drilling guidelines be prepared and that assessment be made of their economic effectiveness. (NEDO)

  17. High- and middle-energy geothermics

    International Nuclear Information System (INIS)

    Anon.

    1995-01-01

    High and middle energy geothermal resources correspond to temperature intervals of 220-350 C and 90-180 C, respectively, and are both exploited for electricity production. Exploitation techniques and applications of high and of middle energy geothermics are different. High energy geothermics is encountered in active volcanic and tectonic zones, such as the circum-Pacific fire-belt, the lesser Antilles, the peri-Mediterranean Alpine chain or the African rift zone. The geothermal steam is directly expanded in a turbine protected against gas and minerals corrosion. About 350 high energy plants are distributed in more than 20 different countries and represent 6000 M We. The cost of high energy installed geothermal kWh ranges from 0.20 to 0.50 French Francs. Middle energy geothermics is encountered in sedimentary basins (between 2000 and 4000 m of depth), in localized fractured zones or at lower depth in the high energy geothermal fields. Heat exchangers with organic fluid Rankine cycle technology is used to produce electricity. Unit power of middle energy plants generally ranges from few hundreds of k W to few MW and correspond to a worldwide installed power of about 400 M We. The annual progression of geothermal installed power is estimated to 4 to 8 % in the next years and concerns principally the circum-Pacific countries. In France, geothermal resources are mainly localized in overseas departments. (J.S.). 3 photos

  18. Fiscal 1995 report on the results of the subsidy operation under the Sunshine Project on the development of a geothermal water use power plant, etc. Development of the deep geothermal resource collecting technology (development of the deep geothermal resource drilling technology); 1995 nendo New Sunshine keikaku hojo jigyo seika hokokusho. Nessui riyo hatsuden plant nado kaihatsu (shinbu chinetsu shigen saishu gijutsu no kaihatsu / shinbu chinetsu shigen kussaku gijutsu no kaihatsu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    The paper reported the results of the fiscal 1995 R and D on the development of deep geothermal resource collecting/drilling technology. In the design of a total development, the trend of technical development was examined of bits, cement and DHM overseas. Further, the simulational prediction was conducted in deep geothermal drilling. As to the development of element technology of hard high temperature strata drilling, the R and D of seal mechanism, bearing mechanism and cutter mechanism were carried out aiming at developing heat resistant/durable bits, and a bit was trially manufactured which was integrated with element parts selected by each element technology. Concerning the development of high temperature drilling mud, studies were made of the development of drilling mud materials, a mud system, etc. Relating to the development of high temperature cement slurry, the development was conducted of high temperature cement, dewatering adjusting agents, etc. As to the development of high accuracy much inclination drilling technology, in the development of high temperature use downhole motor, tests on heat resistance/durability were carried out in the mud of 12 kinds of high heat resistant stator materials. 175 figs., 137 tabs.

  19. Desalination of Impaired Water Using Geothermal Energy

    Energy Technology Data Exchange (ETDEWEB)

    Turchi, Craig S [National Renewable Energy Laboratory (NREL), Golden, CO (United States); Akar, Sertac [National Renewable Energy Laboratory (NREL), Golden, CO (United States); Cath, Tzahi [Colorado School of Mines; Vanneste, Johan [Colorado School of Mines; Gustafson, Emily [Colorado School of Mines

    2017-10-04

    Membrane distillation (MD) and nanofiltration (NF) are explored as a means to provide high quality water for on-site use at the Tuscarora geothermal power plant in northern Nevada. The plant uses a wet cooling tower, but decreasing flow from the wells providing makeup water necessitates exploration for alternative water or alternative cooling sources. Scenarios are explored to extend cooling water by (1) extracting fresh water from the geothermal brine, (2) upgrading the makeup-water quality to allow for increased cycles of concentration in the cooling tower, or (3) recovering water from the cooling tower blowdown. The preliminary cost analysis indicates that applying NF to extract water from the injection brine is the most attractive option of the scenarios examined. This approach may be useful for other plants as well. The estimated cost for the NF treatment of the injection brine ranges from $0.63/m3 to $0.45/m3 and provides a reduction in the current makeup well flows of 35% to 71%. Savings from the reduction in makeup well pumping and chemical treatment do not fully offset the estimated cost of the proposed treatment systems; the site will have to weigh the cost of these water treatment options versus alternatives in light of the diminishing flows from the existing cooling-water wells. Testing is planned to quantify the performance of the proposed NF and MD technologies and help refine the estimated system costs.

  20. Research on Coal Exploration Technology Based on Satellite Remote Sensing

    Directory of Open Access Journals (Sweden)

    Dong Xiao

    2016-01-01

    Full Text Available Coal is the main source of energy. In China and Vietnam, coal resources are very rich, but the exploration level is relatively low. This is mainly caused by the complicated geological structure, the low efficiency, the related damage, and other bad situations. To this end, we need to make use of some advanced technologies to guarantee the resource exploration is implemented smoothly and orderly. Numerous studies show that remote sensing technology is an effective way in coal exploration and measurement. In this paper, we try to measure the distribution and reserves of open-air coal area through satellite imagery. The satellite picture of open-air coal mining region in Quang Ninh Province of Vietnam was collected as the experimental data. Firstly, the ENVI software is used to eliminate satellite imagery spectral interference. Then, the image classification model is established by the improved ELM algorithm. Finally, the effectiveness of the improved ELM algorithm is verified by using MATLAB simulations. The results show that the accuracies of the testing set reach 96.5%. And it reaches 83% of the image discernment precision compared with the same image from Google.

  1. Cradle-to-Grave Logistic Technologies for Exploration Missions

    Science.gov (United States)

    Broyan, James L.; Ewert, Michael K.; Shull, Sarah

    2013-01-01

    Human exploration missions under study are very limited by the launch mass capacity of exiting and planned vehicles. The logistical mass of crew items is typically considered separate from the vehicle structure, habitat outfitting, and life support systems. Consequently, crew item logistical mass is typically competing with vehicle systems for mass allocation. NASA is Advanced Exploration Systems (AES) Logistics Reduction and Repurposing (LRR) Project is developing four logistics technologies guided by a systems engineering cradle-to-grave approach to enable used crew items to augment vehicle systems. Specifically, AES LRR is investigating the direct reduction of clothing mass, the repurposing of logistical packaging, the processing of spent crew items to benefit radiation shielding and water recovery, and the conversion of trash to propulsion supply gases. The systematic implementation of these types of technologies will increase launch mass efficiency by enabling items to be used for secondary purposes and improve the habitability of the vehicle as the mission duration increases. This paper provides a description, benefits, and challenges of the four technologies under development and a status of progress at the mid ]point of the three year AES project.

  2. Geothermal in transition

    International Nuclear Information System (INIS)

    Anderson, J.L.

    1991-01-01

    This article examines the current market for geothermal projects in the US and overseas. The topics of the article include future capacity needs, upgrading the Coso Geothermal project, the productivity of the Geysers area of Northern California, the future of geothermal, and new projects at Soda Lake, Carson Basin, Unalaska Island, and the Puna Geothermal Venture in Hilo, Hawaii

  3. Geothermal Power Generation Plant

    Energy Technology Data Exchange (ETDEWEB)

    Boyd, Tonya [Oregon Inst. of Technology, Klamath Falls, OR (United States). Geo-Heat Center

    2013-12-01

    Oregon Institute of Technology (OIT) drilled a deep geothermal well on campus (to 5,300 feet deep) which produced 196°F resource as part of the 2008 OIT Congressionally Directed Project. OIT will construct a geothermal power plant (estimated at 1.75 MWe gross output). The plant would provide 50 to 75 percent of the electricity demand on campus. Technical support for construction and operations will be provided by OIT’s Geo-Heat Center. The power plant will be housed adjacent to the existing heat exchange building on the south east corner of campus near the existing geothermal production wells used for heating campus. Cooling water will be supplied from the nearby cold water wells to a cooling tower or air cooling may be used, depending upon the type of plant selected. Using the flow obtained from the deep well, not only can energy be generated from the power plant, but the “waste” water will also be used to supplement space heating on campus. A pipeline will be construction from the well to the heat exchanger building, and then a discharge line will be construction around the east and north side of campus for anticipated use of the “waste” water by facilities in an adjacent sustainable energy park. An injection well will need to be drilled to handle the flow, as the campus existing injection wells are limited in capacity.

  4. Geothermal system 'Toplets' and geothermal potential of Dojran region

    International Nuclear Information System (INIS)

    Karakashev, Deljo; Delipetrov, Marjan; Jovanov, Kosta

    2008-01-01

    The Toplets geothermal spring that expands into a wide geothermal net in the watershed of Lake Dojran along the geophysical exploration work carried out in the terrain, indicated the presence of a significant geothermal potential in the region. In the future it may become the major factor for the development of vegetable growing, the use of the medicinal properties of the mineral spas and tourism as well as the prosperity of the region. Water temperature in Lake Dojran amounts 15°C to 28°C during the year that is mach higher compared with the temperature of water lakes in neighbouring Greece. This indicates that beneath Lake Dojran there are other geothermal sources that replenish the lake with thermal water. Such manifestations of geothermal energy in the region along with other thermal phenomena speak for the presence of large reserves of geothermal energy in the Dojran depression. (Author)

  5. Geothermal system 'Toplets' and geothermal potential of Dojran region

    International Nuclear Information System (INIS)

    Karakashev, Deljo; Delipetrov, Marjan; Jovanov, Kosta

    2007-01-01

    The Toplets geothermal spring that expands into a wide geothermal net in the watershed of Lake Dojran along the geophysical exploration work carried out in the terrain, indicated the presence of a significant geothermal potential in the region. In the future it may become the major factor for the development of vegetable growing, the use of the medicinal properties of the mineral spas and tourism as well as the prosperity of the region. Water temperature in Lake Dojran amounts 15°C to 28°C during the year that is mach higher compared with the temperature of water lakes in neighbouring Greece. This indicates that beneath Lake Dojran there are other geothermal sources that replenish the lake with thermal water. Such manifestations of geothermal energy in the region along with other thermal phenomena speak for the presence of large reserves of geothermal energy in the Dojran depression. (Author)

  6. Galileo Avionica's technologies and instruments for planetary exploration.

    Science.gov (United States)

    Battistelli, E; Falciani, P; Magnani, P; Midollini, B; Preti, G; Re, E

    2006-12-01

    Several missions for planetary exploration, including comets and asteroids, are ongoing or planned by the European Space Agencies: Rosetta, Venus Express, Bepi Colombo, Dawn, Aurora and all Mars Programme (in its past and next missions) are good examples. The satisfaction of the scientific request for the mentioned programmes calls for the development of new instruments and facilities devoted to investigate the body (planet, asteroid or comet) both remotely and by in situ measurements. The paper is an overview of some instruments for remote sensing and in situ planetary exploration already developed or under study by Galileo Avionica Space & Electro-Optics B.U. (in the following shortened as Galileo Avionica) for both the Italian Space Agency (ASI) and for the European Space Agency (ESA). Main technologies and specifications are outlined; for more detailed information please refer to Galileo Avionica's web-site at: http://www.galileoavionica.com .

  7. Geothermal Progress Monitor report No. 11

    Energy Technology Data Exchange (ETDEWEB)

    1989-12-01

    This issue of the Geothermal Progress Monitor (GPM) is the 11th since the inception of the publication in 1980. It continues to synthesize information on all aspects of geothermal development in this country and abroad to permit identification and quantification of trends in the use of this energy technology. In addition, the GPM is a mechanism for transferring current information on geothermal technology development to the private sector, and, over time, provides a historical record for those interested in the development pathway of the resource. In sum, the Department of Energy makes the GPM available to the many diverse interests that make up the geothermal community for the multiple uses it may serve. This issue of the GPM points up very clearly how closely knit many of those diverse interests have become. It might well be called an international issue'' since many of its pages are devoted to news of geothermal development abroad, to the efforts of the US industry to participate in overseas development, to the support given those efforts by federal and state agencies, and to the formation of the International Geothermal Association (IGA). All of these events indicate that the geothermal community has become truly international in character, an occurrence that can only enhance the future of geothermal energy as a major source of energy supply worldwide. 15 figs.

  8. Exploring technology impacts of Healthcare 2.0 initiatives.

    Science.gov (United States)

    Randeree, Ebrahim

    2009-04-01

    As Internet access proliferates and technology becomes more accessible, the number of people online has been increasing. Web 2.0 and the social computing phenomena (such as Facebook, Friendster, Flickr, YouTube, Blogger, and MySpace) are creating a new reality on the Web: Users are changing from consumers of Web-available information and resources to generators of information and content. Moving beyond telehealth and Web sites, the push toward Personal Health Records has emerged as a new option for patients to take control of their medical data and to become active participants in the push toward widespread digitized healthcare. There is minimal research on the impact of Web 2.0 in healthcare. This paper reviews the changing patient-physician relationship in the Healthcare 2.0 environment, explores the technological challenges, and highlights areas for research.

  9. Exploring memory hierarchy design with emerging memory technologies

    CERN Document Server

    Sun, Guangyu

    2014-01-01

    This book equips readers with tools for computer architecture of high performance, low power, and high reliability memory hierarchy in computer systems based on emerging memory technologies, such as STTRAM, PCM, FBDRAM, etc.  The techniques described offer advantages of high density, near-zero static power, and immunity to soft errors, which have the potential of overcoming the “memory wall.”  The authors discuss memory design from various perspectives: emerging memory technologies are employed in the memory hierarchy with novel architecture modification;  hybrid memory structure is introduced to leverage advantages from multiple memory technologies; an analytical model named “Moguls” is introduced to explore quantitatively the optimization design of a memory hierarchy; finally, the vulnerability of the CMPs to radiation-based soft errors is improved by replacing different levels of on-chip memory with STT-RAMs.   ·         Provides a holistic study of using emerging memory technologies i...

  10. Innovative Technologies for Human Exploration: Opportunities for Partnerships and Leveraging Novel Technologies External to NASA

    Science.gov (United States)

    Hay, Jason; Mullins, Carie; Graham, Rachael; Williams-Byrd, Julie; Reeves, John D.

    2011-01-01

    Human spaceflight organizations have ambitious goals for expanding human presence throughout the solar system. To meet these goals, spaceflight organizations have to overcome complex technical challenges for human missions to Mars, Near Earth Asteroids, and other distant celestial bodies. Resolving these challenges requires considerable resources and technological innovations, such as advancements in human health and countermeasures for space environments; self-sustaining habitats; advanced power and propulsion systems; and information technologies. Today, government space agencies seek cooperative endeavors to reduce cost burdens, improve human exploration capabilities, and foster knowledge sharing among human spaceflight organizations. This paper looks at potential opportunities for partnerships and spin-ins from economic sectors outside the space industry. It highlights innovative technologies and breakthrough concepts that could have significant impacts on space exploration and identifies organizations throughout the broader economy that specialize in these technologies.

  11. The Evolution of Ecosystems for Converging Technologies – Drivers and Barriers of Technology Exploration and Exploitation

    DEFF Research Database (Denmark)

    Laufs, Daniel; Giones, Ferran; Schultz, Carsten

    2018-01-01

    Convergent technologies, like biotechnology, rely on the contribution of multiple scientific disciplines and are applied to distant needs and markets. As such, the development of technologies and related applications fields require the evolution of ecosystems that involve multidisciplinary......, previously unrelated, actors in collaborative exploration and exploitation processes. We know little on how these processes unfold, in particular in the early stages of the ecosystem development. Previous research suggests that human and social capital [1], patents and VC funding [2], or market orientation....... This helps us to generate an understanding of the pattern of technology convergence as well as of the drivers and barriers that affect the innovation process. In order to develop a holistic framework of the interplay between technology exploration and exploitation and the relevant ecosystem, we perform...

  12. Fiscal 1997 verification and survey of geothermal prospecting technology etc. 2/2. Survey report on deep-seated geothermal resources; 1997 nendo chinetsu tansa gijutsu nado kensho chosa hokokusho. 2/2. Shinbu chinetsu shigen chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-02-01

    For the purpose of reducing the risk to accompany the exploitation of deep-seated geothermal resources, investigations are conducted into the three factors that govern the formation of geothermal resources at deep levels, that is, the supply of heat from heat sources, the supply of geothermal fluids, and the development of fracture systems contributing to the constitution of reservoir structures. In the evaluation and study of reservoirs and the amount of resources, a reservoir simulation is conducted to grasp the characteristics of reservoirs and the amount of resources. For this purpose, the origin and history of the Kakkonda geothermal field are studied, with special attention paid to the origin of the difference in temperature between the shallow-seated and deep-seated reservoirs, the geometry of granite at Kakkonda, the region of recharge of meteoric water, the distribution of saline concentration in the natural state and the cause of the occurrence, the amount of supply of fluids and heat from the depth to the reservoirs, etc. In the evaluation and study of the economic effectiveness of the exploitation of deep-seated geothermal resources, it is learned that, if a 50MW geothermal power station is to be built at a deep level (drilled depth of 3000m on the average) with a rate of 50% attained in drilling, the steam amount required at such a deep level (presumed to be 75t/h) will be more than twice that required at a shallow level (presumed to be 35/h). (NEDO)

  13. Federal Geothermal Research Program Update Fiscal Year 2002

    Energy Technology Data Exchange (ETDEWEB)

    2003-09-01

    The Department of Energy (DOE) and its predecessors have conducted research and development (R&D) in geothermal energy since 1971. To develop the technology needed to harness the Nation's vast geothermal resources, DOE's Office of Geothermal Technologies oversees a network of national laboratories, industrial contractors, universities, and their subcontractors. The goals are: (1) Double the number of States with geothermal electric power facilities to eight by 2006; (2) Reduce the levelized cost of generating geothermal power to 3-5 cents per kWh by 2007; and (3) Supply the electrical power or heat energy needs of 7 million homes and businesses in the United States by 2010. This Federal Geothermal Program Research Update reviews the specific objectives, status, and accomplishments of DOE's Geothermal Program for Federal Fiscal Year (FY) 2002. The information contained in this Research Update illustrates how the mission and goals of the Office of Geothermal Technologies are reflected in each R&D activity. The Geothermal Program, from its guiding principles to the most detailed research activities, is focused on expanding the use of geothermal energy. balanced strategy for the Geothermal Program.

  14. Federal Geothermal Research Program Update Fiscal Year 2003

    Energy Technology Data Exchange (ETDEWEB)

    2004-03-01

    The Department of Energy (DOE) and its predecessors have conducted research and development (R&D) in geothermal energy since 1971. To develop the technology needed to harness the Nation's vast geothermal resources, DOE's Office of Geothermal Technologies oversees a network of national laboratories, industrial contractors, universities, and their subcontractors. The following mission and goal statements guide the overall activities of the Office. The goals are: (1) Reduce the levelized cost of generating geothermal power to 3-5 cents per kWh by 2007; (2) Double the number of States with geothermal electric power facilities to eight by 2006; and (3) Supply the electrical power or heat energy needs of 7 million homes and businesses in the United States by 2010. This Federal Geothermal Program Research Update reviews the accomplishments of DOE's Geothermal Program for Federal Fiscal Year (FY) 2003. The information contained in this Research Update illustrates how the mission and goals of the Office of Geothermal Technologies are reflected in each R&D activity. The Geothermal Program, from its guiding principles to the most detailed research activities, is focused on expanding the use of geothermal energy. balanced strategy for the Geothermal Program.

  15. Hot Topics! Heat Pumps and Geothermal Energy

    Science.gov (United States)

    Roman, Harry T.

    2009-01-01

    The recent rapid rises in the cost of energy has significantly increased interest in alternative energy sources. The author discusses the underlying principles of heat pumps and geothermal energy. Related activities for technology education students are included.

  16. Is the Philippine geothermal resource sustainable?

    International Nuclear Information System (INIS)

    Lalo, J.; Raymundo, E.

    2005-01-01

    This paper aims to illustrate the scenario in the Geothermal Energy Development Projects in the Philippines, to make the Filipino population aware that there is an existing cleaner technology available that is being utilized in Europe; for the Philippine geothermal energy project operators to adapt a cleaner production technology that has no harmful emission, hence, no pollution technology; to help end the conflict between stake holders and geothermal players through the introduction of cleaner production technology intervention. While it is a fact that the Philippines' Geothermal resource is second to U.S. or around the globe, the unwise utilization of geothermal energy may lead to depletion, hence, becomes non-renewable. It should be understood that the geothermal energy is a renewable resource only if the development process is sustainable. There is a need to educate the Filipino populace regarding a cleaner production technology as well as our government and political leaders. This cleaner production technology is a solution to the stake holders. It is of great importance to inform the Filipino people that there is an existing cleaner new technology from Europe and U.S. that is not pollutive in nature and is essentially sustainable development scheme since underground reservoirs are not depleted in the process. (author)

  17. Marysville, Montana, Geothermal Project: Geological and Geophysical Exploration at Marysville Geothermal Area: 1973 Results (With a Section on ''Contemporary Seismicity in the Helena, Montana Region'')

    Energy Technology Data Exchange (ETDEWEB)

    Blackwell, D.D.; Brott, C.A.; Goforth, T.T.; Holdaway, M.J.; Morgan, P.; Friedline, R.; Smith, R.L.

    1974-04-01

    This report describes field geological and geophysical investigations of the Marysville geothermal area, including geological mapping, sample collection, a ground total field magnetic survey, gravity survey, seismic ground noise survey, microearthquake survey, and heat flow study. Although sufficient data are not available, it is likely that a magma chamber is the heat source. A second section, ''Contemporary Seismicity in the Helena, Montana, Region'' examines the coincidence of high heat flow and earthquake swarm activity in this region. (GRA)

  18. Geothermal GW cogeneration system GEOCOGEN

    Energy Technology Data Exchange (ETDEWEB)

    Grob, Gustav R

    2010-09-15

    GEOCOGEN is the GW zero pollution, no risk solution to replace nuclear and fossil fuelled power plants. It can be built near the energy consumption centers, is invisible and produces electricity and heat at a fraction of the cost of any other the energy mix options. It is a break through deep well geothermal energy technology lasting forever driving also millions of electric vehicles.

  19. State policies for geothermal development

    Energy Technology Data Exchange (ETDEWEB)

    Sacarto, D.M.

    1976-01-01

    The most prominent geothermal resources in the USA occur in fifteen Gulf and Western states including Alaska and Hawaii. In each state, authority and guidelines have been established for administration of geothermal leasing and for regulation of development. Important matters addressed by these policies include resource definition, leasing provisions, development regulations, water appropriation, and environmental standards. Some other policies that need attention include taxation, securities regulations, and utility regulations. It is concluded that conditions needed for the geothermal industry to pursue large-scale development are consumer (utility) confidence in the resource; equitable tax treatment; prompt exploration of extensive land areas; long and secure tenure for productive properties; prompt facility siting and development; and competitive access to various consumers. With these conditions, the industry should be competitive with other energy sectors and win its share of investment capital. This publication reviews for the states various technical, economic, and institutional aspects of geothermal development. The report summarizes research results from numerous specialists and outlines present state and Federal policies. The report concludes generally that if public policies are made favorable to their development, geothermal resources offer an important energy resource that could supply all new electric capacity for the fifteen states for the next two decades. This energy--100,000 MW--could be generated at prices competitive with electricity from fossil and nuclear power plants. An extensive bibliography is included. (MCW)

  20. Geothermal resources of the UK

    International Nuclear Information System (INIS)

    Batchelor, A.S.

    1990-01-01

    This paper reports that geothermal energy applications and research are being actively pursued in the United Kingdom despite the relatively normal heat flow regime. The cumulative expenditure on geothermal activity from 1975 to 1989 has been approximately Brit-pounds 46 million of 32% of the Renewable Energy Research Budget to date. The first practical application is a 2 MWt scheme at Southampton as part of a district heating scheme. Commercial operation started in February 1988 and further expansion is planned. The UK's enthusiasm for Hot Dry Rock has dimmed slightly as the entire program is reappraised and the long heralded deep exploration hole has yet to materialize. Future activity looks likely to focus on geothermal opportunities that have multiple uses or applications for the fluids in small scale schemes and Hot Dry Rock research will probably be linked to a pan-European program based in France

  1. NEEMO 21: Tools, Techniques, Technologies and Training for Science Exploration

    Science.gov (United States)

    Graff, T.; Young, K.; Coan, D.; Merselis, D.; Bellantuono, A.; Dougan, K.; Rodriguez-Lanetty, M.; Nedimyer, K.; Chappell, S.; Beaton, K.; hide

    2017-01-01

    The 21st mission of the National Aeronautics and Space Administration (NASA) Extreme Environment Mission Operations (NEEMO) was a highly integrated operational field test and evaluation of tools, techniques, technologies, and training for science driven exploration during extravehicular activity (EVA). The mission was conducted in July 2016 from the Aquarius habitat, an underwater laboratory, off the coast of Key Largo in the Florida Keys National Marine Sanctuary. An international crew of eight (comprised of NASA and ESA astronauts, engineers, medical personnel, and habitat technicians) lived and worked in and around Aquarius and its surrounding reef environment for 16 days. The integrated testing (both interior and exterior objectives) conducted from this unique facility continues to support current and future human space exploration endeavors. Expanding on the scientific and operational evaluations conducted during NEEMO 20, the 21st NEEMO mission further incorporated a diverse Science Team comprised of planetary geoscientists from the Astromaterials Research and Exploration Science (ARES/XI) Division from the Johnson Space Center, marine scientists from the Department of Biological Sciences at Florida International University (FIU) Integrative Marine Genomics and Symbiosis (IMaGeS) Lab, and conservationists from the Coral Restoration Foundation. The Science Team worked in close coordination with the long-standing EVA operations, planning, engineering, and research components of NEEMO in all aspects of mission planning, development, and execution.

  2. Geothermal rice drying unit in Kotchany, Macedonia

    International Nuclear Information System (INIS)

    Popovski, K.; Dimitrov, K.; Andrejevski, B.; Popovska, S.

    1992-01-01

    A geothermal field in Kotchany (Macedonia) has very advantageous characteristics for direct application purposes. Low content of minerals, moderate temperature (78C) and substantial available geothermal water flow (up to 300 1/s) enabled the establishment of a district heating scheme comprising mainly agricultural and industrial uses. A rice drying unit of 10 t/h capacity was installed 8 years ago, using the geothermal water as the primary heat source. A temperature drop of 75/50C enables the adaptation of conventional drying technology, already proven in practice in the surrounding rice growing region. Water to air heat exchanger and all necessary equipment and materials are of local production, made of copper and carbon steel. The use of such drying units is strongly recommended for the concrete district heating scheme because it offers a very simple geothermal application and enables improvement in the annual heating load factor without high investments in geothermal water distribution lines

  3. Human Outer Solar System Exploration via Q-Thruster Technology

    Science.gov (United States)

    Joosten, B. Kent; White, Harold G.

    2014-01-01

    Propulsion technology development efforts at the NASA Johnson Space Center continue to advance the understanding of the quantum vacuum plasma thruster (QThruster), a form of electric propulsion. Through the use of electric and magnetic fields, a Q-thruster pushes quantum particles (electrons/positrons) in one direction, while the Qthruster recoils to conserve momentum. This principle is similar to how a submarine uses its propeller to push water in one direction, while the submarine recoils to conserve momentum. Based on laboratory results, it appears that continuous specific thrust levels of 0.4 - 4.0 N/kWe are achievable with essentially no onboard propellant consumption. To evaluate the potential of this technology, a mission analysis tool was developed utilizing the Generalized Reduced Gradient non-linear parameter optimization engine contained in the Microsoft Excel® platform. This tool allowed very rapid assessments of "Q-Ship" minimum time transfers from earth to the outer planets and back utilizing parametric variations in thrust acceleration while enforcing constraints on planetary phase angles and minimum heliocentric distances. A conservative Q-Thruster specific thrust assumption (0.4 N/kWe) combined with "moderate" levels of space nuclear power (1 - 2 MWe) and vehicle specific mass (45 - 55 kg/kWe) results in continuous milli-g thrust acceleration, opening up realms of human spaceflight performance completely unattainable by any current systems or near-term proposed technologies. Minimum flight times to Mars are predicted to be as low as 75 days, but perhaps more importantly new "retro-phase" and "gravity-augmented" trajectory shaping techniques were revealed which overcome adverse planetary phasing and allow virtually unrestricted departure and return opportunities. Even more impressively, the Jovian and Saturnian systems would be opened up to human exploration with round-trip times of 21 and 32 months respectively including 6 to 12 months of

  4. Geothermal heat pump performance

    Energy Technology Data Exchange (ETDEWEB)

    Boyd, Tonya L.; Lienau, Paul J.

    1995-01-01

    Geothermal heat pump systems are a promising new energy technology that has shown rapid increase in usage over the past ten years in the United States. These systems offer substantial benefits to customers and utilities in energy (kWh) and demand (kW) savings. The purpose of this study was to determine what existing monitored data was available mainly from electric utilities on heat pump performance, energy savings and demand reduction for residential, school, and commercial building applications. Information was developed on the status of electric utility marketing programs, barriers to market penetration, incentive programs, and benefits.

  5. Geothermal Heat Pump Performance

    Energy Technology Data Exchange (ETDEWEB)

    Boyd, Tonya L.; Lienau, Paul J.

    1995-01-01

    Geothermal heat pump systems are a promising new energy technology that has shown rapid increase in usage over the past ten years in the United States. These systems offer substantial benefits to customers and utilities in energy (kWh) and demand (kW) savings. The purpose of this study was to determine what existing monitored data was available mainly from electric utilities on heat pump performance, energy savings and demand reduction for residential, school, and commercial building applications. Information was developed on the status of electric utility marketing programs, barriers to market penetration, incentive programs, and benefits.

  6. Geothermal heating saves energy

    International Nuclear Information System (INIS)

    Romsaas, Tor

    2003-01-01

    The article reviews briefly a pioneer project for a construction area of 200000 m''2 with residences, business complexes, a hotel and conference centre and a commercial college in Oslo. The energy conservation potential is estimated to be about 60-70 % compared to direct heating with oil, gas or electricity as sources. There will also be substantial reduction in environmentally damaging emissions. The proposed energy central combines geothermal energy sources with heat pump technology, utilises water as energy carrier and uses terrestrial wells for energy storage. A cost approximation is presented

  7. Geothermal-resource verification for Air Force bases

    Energy Technology Data Exchange (ETDEWEB)

    Grant, P.R. Jr.

    1981-06-01

    This report summarizes the various types of geothermal energy reviews some legal uncertainties of the resource and then describes a methodology to evaluate geothermal resources for applications to US Air Force bases. Estimates suggest that exploration costs will be $50,000 to $300,000, which, if favorable, would lead to drilling a $500,000 exploration well. Successful identification and development of a geothermal resource could provide all base, fixed system needs with an inexpensive, renewable energy source.

  8. Fission Power System Technology for NASA Exploration Missions

    Science.gov (United States)

    Mason, Lee; Houts, Michael

    2011-01-01

    Under the NASA Exploration Technology Development Program, and in partnership with the Department of Energy (DOE), NASA is conducting a project to mature Fission Power System (FPS) technology. A primary project goal is to develop viable system options to support future NASA mission needs for nuclear power. The main FPS project objectives are as follows: 1) Develop FPS concepts that meet expected NASA mission power requirements at reasonable cost with added benefits over other options. 2) Establish a hardware-based technical foundation for FPS design concepts and reduce overall development risk. 3) Reduce the cost uncertainties for FPS and establish greater credibility for flight system cost estimates. 4) Generate the key products to allow NASA decisionmakers to consider FPS as a preferred option for flight development. In order to achieve these goals, the FPS project has two main thrusts: concept definition and risk reduction. Under concept definition, NASA and DOE are performing trade studies, defining requirements, developing analytical tools, and formulating system concepts. A typical FPS consists of the reactor, shield, power conversion, heat rejection, and power management and distribution (PMAD). Studies are performed to identify the desired design parameters for each subsystem that allow the system to meet the requirements with reasonable cost and development risk. Risk reduction provides the means to evaluate technologies in a laboratory test environment. Non-nuclear hardware prototypes are built and tested to verify performance expectations, gain operating experience, and resolve design uncertainties.

  9. Comprehensive Evaluation of the Geothermal Resource Potential within the Pyramid Lake Paiute Reservation Phase III Report

    Energy Technology Data Exchange (ETDEWEB)

    Noel, Donna [Pyramid Lake Paiute Tribe, Nixon, NV (United States)

    2013-12-01

    This project integrated state-of-the-art exploration technologies with a geologic framework and reservoir modeling to ultimately determine the efficacy of future geothermal production within the PLPT reservation. The information gained during this study should help the PLPT to make informed decisions regarding construction of a geothermal power plant. Additional benefits included the transfer of new technologies and geothermal data to the geothermal industry and it created and/or preserved nearly three dozen jobs accordance with the American Recovery and Reinvestment Act of 2009. A variety of tasks were conducted to achieve the above stated objectives. The following are the tasks completed within the project: 1. Permitting 2. Shallow temperature survey 3. Seismic data collection and analysis 4. Fracture stress analysis 5. Phase I reporting Permitting 7. Shallow temperature survey 8. Seismic data collection and analysis 9. Fracture stress analysis 10. Phase I reporting 11. Drilling two new wells 12. Borehole geophysics 13. Phase II reporting 14. Well testing and geochemical analysis 15. Three-dimensional geologic model 16. Three-dimensional reservoir analysis 17. Reservation wide geothermal potential analysis 18. Phase III reporting Phase I consisted of tasks 1 – 5, Phase II tasks 6 – 8, and Phase III tasks 9 – 13. This report details the results of Phase III tasks. Reports are available for Phase I, and II as separate documents.

  10. Geothermal energy. Pt.2

    International Nuclear Information System (INIS)

    Anon.

    1990-01-01

    Geothermal energy has certain features that make it highly recommendable as a source of power production. It is noted by its high load factor; it may be used as a basic or peak source; its versatility and high availability among others. In spite of these advantages, geothermal energy has not attained a significant development up to now. There are several reasons for this to happen, while the main one is that it requires an important initial investment. Assessing if an area is potentially profitable for the obtention of a given type of energy implies performing a complex set of analyses and prospective work, but it is not so significant as that associated with petroleum. The strategy for the exploration of geothermal resources is based on the execution of consecutive stages ranging from a surveillance at a regional scale to a project feasibility study, with growing investments and using more and more complex techniques. Many Latin American countries are located in areas considered as promisory concerning the development of this type of exploitation. Another factor supporting this view is a special demographic feature, showing a very irregular distribution of the population, with extense isolated areas with a minimun number of inhabitants that does not justify the extension of the electric power network. There are plants operating in four countries producing, as a whole, 881 MW. In Argentina the activities are aimed to intensifying the knowledge about the availability of this resource within the local territory and to estimating the feasibility of its usage in areas where exploration is more advanced [es

  11. Advanced Exploration Technologies: Micro and Nano Technologies Enabling Space Missions in the 21st Century

    Science.gov (United States)

    Krabach, Timothy

    1998-01-01

    Some of the many new and advanced exploration technologies which will enable space missions in the 21st century and specifically the Manned Mars Mission are explored in this presentation. Some of these are the system on a chip, the Computed-Tomography imaging Spectrometer, the digital camera on a chip, and other Micro Electro Mechanical Systems (MEMS) technology for space. Some of these MEMS are the silicon micromachined microgyroscope, a subliming solid micro-thruster, a micro-ion thruster, a silicon seismometer, a dewpoint microhygrometer, a micro laser doppler anemometer, and tunable diode laser (TDL) sensors. The advanced technology insertion is critical for NASA to decrease mass, volume, power and mission costs, and increase functionality, science potential and robustness.

  12. Recovery Act. Direct Confirmation of Commercial Geothermal Resources in Colorado Using Remote Sensing and On-Site Exploration, Testing, and Analysis

    Energy Technology Data Exchange (ETDEWEB)

    Foley, Paul [Pagosa Verde LLC, Pagosa Springs, CO (United States); Skeehan, Kirsten [Pagosa Verde LLC, Pagosa Springs, CO (United States); Smith, Jerome [Pagosa Verde LLC, Pagosa Springs, CO (United States); Mink, Roy [Pagosa Verde LLC, Pagosa Springs, CO (United States); Geohydro, Mink [Pagosa Verde LLC, Pagosa Springs, CO (United States)

    2016-02-16

    Report on the confirmation of Commercial Geothermal Resources in Colorado describing the on site testing and analysis to confirm remote sensing identified potential resources. A series of thermal gradient wells were drilled in the Pagosa Springs region and the data collected is analyzed within.

  13. Fiscal 1997 verification and survey of geothermal prospecting technology etc. 1/2. Survey report on deep-seated geothermal resources; 1997 nendo chinetsu tansa gijutsu nado kensho chosa hokokusho. 1/2. Shinbu chinetsu shigen chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-02-01

    For the purpose of reducing the risk to accompany the exploitation of deep-seated geothermal resources, investigations are conducted into the three factors that govern the formation of geothermal resources at deep levels, that is, the supply of heat from heat sources, the supply of geothermal fluids, and the development of fracture systems contributing to the constitution of reservoir structures. In fiscal 1997, a fumarolic gas test is conducted at the deep-seated geothermal well WD-1b which was drilled in the preceding fiscal year. In the test, chemical and isotopic characteristics are compared between the fluids of the WD-1b and the other existing deep-seated wells, and it is found that the fluids from the WD1b originates in surface water just like the fluids from the others and that the constitution of its gas is not greatly affected by magmatic fluids. A PTS (Pressure, Temperature, Spinner flowmeter) logging is performed to observe conditions in the well with the fluids being discharged and to know the inflow point and rate the fumarolic fluids, and the result is utilized to presume the 3-dimensional stress in the vicinity of the WD-1. An isotopic measurement of water included in the fluids is conducted to examine the origin of the geothermal fluids, constant observation and analysis of micro-earthquakes are carried out, and the fluid flow and fluid hydraulic characteristics are also studied. (NEDO)

  14. Exploring cardinality in the era of touchscreen-based technology

    Science.gov (United States)

    Sedaghatjou, Mina; Campbell, Stephen R.

    2017-11-01

    This paper explores how a young child (56 m) builds an understanding of the cardinality principle through communicative, touchscreen-based activities involving talk, gesture and body engagement working via multimodal, touchscreen interface using contemporary mobile technology. Drawing upon Nemirovsky's perceptuomotor integration theoretical lens and other foundational aspects of Husserlian phenomenology, we present an in-depth case study of a preschool child developing mathematical expertise and tool fluency using an iPad application called TouchCounts to operate with cardinal numbers. Overall, this study demonstrates that the one-on-one multimodal touch, sight and auditory feedback via a touchscreen device can serve to assist in a child's development of cardinality.

  15. Exploring expressivity and emotion with artificial voice and speech technologies.

    Science.gov (United States)

    Pauletto, Sandra; Balentine, Bruce; Pidcock, Chris; Jones, Kevin; Bottaci, Leonardo; Aretoulaki, Maria; Wells, Jez; Mundy, Darren P; Balentine, James

    2013-10-01

    Emotion in audio-voice signals, as synthesized by text-to-speech (TTS) technologies, was investigated to formulate a theory of expression for user interface design. Emotional parameters were specified with markup tags, and the resulting audio was further modulated with post-processing techniques. Software was then developed to link a selected TTS synthesizer with an automatic speech recognition (ASR) engine, producing a chatbot that could speak and listen. Using these two artificial voice subsystems, investigators explored both artistic and psychological implications of artificial speech emotion. Goals of the investigation were interdisciplinary, with interest in musical composition, augmentative and alternative communication (AAC), commercial voice announcement applications, human-computer interaction (HCI), and artificial intelligence (AI). The work-in-progress points towards an emerging interdisciplinary ontology for artificial voices. As one study output, HCI tools are proposed for future collaboration.

  16. Implementation Plan for the Hawaii Geothermal Project Environmental Impact Statement (DOE Review Draft:)

    Energy Technology Data Exchange (ETDEWEB)

    None

    1992-09-18

    The US Department of Energy (DOE) is preparing an Environmental Impact Statement (EIS) that identifies and evaluates the environmental impacts associated with the proposed Hawaii Geothermal Project (HGP), as defined by the State of Hawaii in its 1990 proposal to Congress (DBED 1990). The location of the proposed project is shown in Figure 1.1. The EIS is being prepared pursuant to the requirements of the National Environmental Policy Act of 1969 (NEPA), as implemented by the President's Council on Environmental Quality (CEQ) regulations (40 CFR Parts 1500-1508) and the DOE NEPA Implementing Procedures (10 CFR 1021), effective May 26, 1992. The State's proposal for the four-phase HGP consists of (1) exploration and testing of the geothermal resource beneath the slopes of the active Kilauea volcano on the Island of Hawaii (Big Island), (2) demonstration of deep-water power cable technology in the Alenuihaha Channel between the Big Island and Mau, (3) verification and characterization of the geothermal resource on the Big Island, and (4) construction and operation of commercial geothermal power production facilities on the Big Island, with overland and submarine transmission of electricity from the Big Island to Oahu and possibly other islands. DOE prepared appropriate NEPA documentation for separate federal actions related to Phase 1 and 2 research projects, which have been completed. This EIS will consider Phases 3 and 4, as well as reasonable alternatives to the HGP. Such alternatives include biomass coal, solar photovoltaic, wind energy, and construction and operation of commercial geothermal power production facilities on the Island of Hawaii (for exclusive use on the Big Island). In addition, the EIs will consider the reasonable alternatives among submarine cable technologies, geothermal extraction, production, and power generating technologies; pollution control technologies; overland and submarine power transmission routes; sites reasonably suited to

  17. Exploration Drilling and Technology Demonstration At Fort Bliss

    Energy Technology Data Exchange (ETDEWEB)

    Barker, Ben; Moore, Joe [EGI; Segall, Marylin; Nash, Greg; Simmons, Stuart; Jones, Clay; Lear, Jon; Bennett, Carlon

    2014-02-26

    The Tularosa-Hueco basin in south-central New Mexico has long been known as an extensional area of high heat flow. Much of the basin is within the Fort Bliss military reservation, which is an exceptionally high value customer for power independent of the regional electric grid and for direct use energy in building climate control. A series of slim holes drilled in the 1990s established the existence of a thermal anomaly but not its practical value. This study began in 2009 with a demonstration of new exploration drilling technology. The subsequent phases reported here delivered a useful well, comparative exploration data sets and encouragement for further development. A production-size well, RMI56-5, was sited after extensive study of archival and newly collected data in 2010-2011. Most of 2012 was taken up with getting state and Federal authorities to agree on a lead agency for permitting purposes, getting a drilling permit and redesigning the drilling program to suit available equipment. In 2013 we drilled, logged and tested a 924 m well on the McGregor Range at Fort Bliss using a reverse circulation rig. Rig tests demonstrated commercial permeability and the well has a 7-inch slotted liner for use either in production or injection. An August 2013 survey of the completed well showed a temperature of 90 C with no reversal, the highest such temperature in the vicinity. The well’s proximity to demand suggests a potentially valuable resource for direct use heat and emergency power generation. The drilling produced cuttings of excellent size and quality. These were subjected to traditional analyses (thin sections, XRD) and to the QEMScan™ for comparison. QEMScan™ technology includes algorithms for determining such properties of rocks as density, mineralogy, heavy/light atoms, and porosity to be compared with direct measurements of the cuttings. In addition to a complete cuttings set, conventional and resistivity image logs were obtained in the open hole before

  18. Geothermal prospects in British Columbia: Resource, market and regulatory aspects

    International Nuclear Information System (INIS)

    Ghomshei, M.M.; Brown, T.L.S.; MacRae, J.M.

    1992-01-01

    British Columbia is host to about 15 young volcanic centres and 60 hot springs, all evidence of presence of geothermal resources. Most high-grade geothermal prospects in British Columbia are located along 3 volcanic belts in the south-western region of the province. It is estimated that a minimum of 800 MWe can be generated from the known prospects in this region. Significant low-grade geothermal resources exist in several provincial regions. Market applications consistent with the geothermal resources known and expected to occur in British Columbia include electrical generation, process and other direct heat uses and recreation. Leasing, exploration and development operations for high-grade geothermal resources are addressed by the British Columbia open-quotes Geothermal Resources Actclose quotes which defines geothermal resources and reserves all rights to the Crown in the right of the Province

  19. Geothermal resources in the Republic of Macedonia

    International Nuclear Information System (INIS)

    Micevski, Eftim; Georgieva, Mirjana; Petrovski, Kiro; Lonchar, Ilija

    1995-01-01

    The Republic of Macedonia is situated in the central part of the Balcan Peninsula and covers a surface of 25. 713 km 2 Its territory is found in one of the most significant geothermal zones in this part of Balkans. The earths crust in this region suffers poli phase structural deformations, which as a result gives different structural features. The geothermal explorations in the Republic of Macedonia intensively started to conduct after 1970, after the first effects of the energy crisis. As a result of these explorations, more than 50 springs of mineral and thermo mineral waters with a total yield of more than 1.400 I./sec. And proved exploitation reservoirs of more than 1.000 I./sec. with temperatures higher than the medium year seasons hesitations for this part of the Earth in the boundaries of 20-75 o C with significant quantities of geothermal energy. This paper will shortly present the available geothermal resources and classification, according the type of geothermal energy, hydro geothermal, lithogeothermal and according the way of transport of the geothermal energy, convective and conductive systems. The next will present short descriptions of the resources, the degree of exploitation and the prognosis dimensions of the reservoirs. (Original)

  20. Enhanced Geothermal Systems

    Energy Technology Data Exchange (ETDEWEB)

    Jeanloz, R. [The MITRE Corporation, McLean, VA (United States); Stone, H. [The MITRE Corporation, McLean, VA (United States); et al.

    2013-12-31

    DOE, through the Geothermal Technologies Office (GTO) within the Office of Energy Efficiency and Renewable Energy, requested this study, identifying a focus on: i) assessment of technologies and approaches for subsurface imaging and characterization so as to be able to validate EGS opportunities, and ii) assessment of approaches toward creating sites for EGS, including science and engineering to enhance permeability and increase the recovery factor. Two days of briefings provided in-depth discussion of a wide range of themes and challenges in EGS, and represented perspectives from industry, government laboratories and university researchers. JASON also contacted colleagues from universities, government labs and industry in further conversations to learn the state of the field and potential technologies relevant to EGS.

  1. The Role of Cost Shared R&D in the Development of Geothermal Resources

    Energy Technology Data Exchange (ETDEWEB)

    None

    1995-03-16

    This U.S. Department of Energy Geothermal Program Review starts with two interesting pieces on industries outlook about market conditions. Dr. Allan Jelacics introductory talk includes the statistics on the impacts of the Industry Coupled Drilling Program (late-1970's) on geothermal power projects in Nevada and Utah (about 140 MWe of power stimulated). Most of the papers in these Proceedings are in a technical report format, with results. Sessions included: Exploration, The Geysers, Reservoir Engineering, Drilling, Energy Conversion (including demonstration of a BiPhase Turbine Separator), Energy Partnerships (including the Lake County effluent pipeline to The Geysers), and Technology Transfer (Biochemical processing of brines, modeling of chemistry, HDR, the OIT low-temperature assessment of collocation of resources with population, and geothermal heat pumps). There were no industry reviews at this meeting.

  2. Exploring Greenland: science and technology in Cold War settings.

    Science.gov (United States)

    Heymann, Matthias; Knudsen, Henrik; Lolck, Maiken L; Nielsen, Henry; Nielsen, Kristian H; Ries, Christopher J

    2010-01-01

    This paper explores a vacant spot in the Cold War history of science: the development of research activities in the physical environmental sciences and in nuclear science and technology in Greenland. In the post-war period, scientific exploration of the polar areas became a strategically important element in American and Soviet defence policy. Particularly geophysical fields like meteorology, geology, seismology, oceanography, and others profited greatly from military interest. While Denmark maintained formal sovereignty over Greenland, research activities were strongly dominated by U.S. military interests. This paper sets out to summarize the limited current state of knowledge about activities in the environmental physical sciences in Greenland and their entanglement with military, geopolitical, and colonial interests of both the USA and Denmark. We describe geophysical research in the Cold War in Greenland as a multidimensional colonial endeavour. In a period of decolonization after World War II, Greenland, being a Danish colony, became additionally colonized by the American military. Concurrently, in a period of emerging scientific internationalism, the U.S. military "colonized" geophysical research in the Arctic, which increasingly became subject to military directions, culture, and rules.

  3. Big Data: an exploration of research, technologies and application cases

    Directory of Open Access Journals (Sweden)

    Emilcy J. Hernández-Leal

    2017-05-01

    Full Text Available Big Data has become a worldwide trend and although still lacks a scientific or academic consensual concept, every day it portends greater market growth that surrounds and the associated research areas. This paper reports a systematic review of the literature on Big Data considering a state of the art about techniques and technologies associated with Big Data, which include capture, processing, analysis and data visualization. The characteristics, strengths, weaknesses and opportunities for some applications and Big Data models that include support mainly for modeling, analysis, and data mining are explored. Likewise, some of the future trends for the development of Big Data are introduced by basic aspects, scope, and importance of each one. The methodology used for exploration involves the application of two strategies, the first corresponds to a scientometric analysis and the second corresponds to a categorization of documents through a web tool to support the process of literature review. As results, a summary and conclusions about the subject are generated and possible scenarios arise for research work in the field.

  4. Exploration Space Suit Architecture: Destination Environmental-Based Technology Development

    Science.gov (United States)

    Hill, Terry R.

    2010-01-01

    This paper picks up where EVA Space Suit Architecture: Low Earth Orbit Vs. Moon Vs. Mars (Hill, Johnson, IEEEAC paper #1209) left off in the development of a space suit architecture that is modular in design and interfaces and could be reconfigured to meet the mission or during any given mission depending on the tasks or destination. This paper will walk though the continued development of a space suit system architecture, and how it should evolve to meeting the future exploration EVA needs of the United States space program. In looking forward to future US space exploration and determining how the work performed to date in the CxP and how this would map to a future space suit architecture with maximum re-use of technology and functionality, a series of thought exercises and analysis have provided a strong indication that the CxP space suit architecture is well postured to provide a viable solution for future exploration missions. Through the destination environmental analysis that is presented in this paper, the modular architecture approach provides the lowest mass, lowest mission cost for the protection of the crew given any human mission outside of low Earth orbit. Some of the studies presented here provide a look and validation of the non-environmental design drivers that will become every-increasingly important the further away from Earth humans venture and the longer they are away. Additionally, the analysis demonstrates a logical clustering of design environments that allows a very focused approach to technology prioritization, development and design that will maximize the return on investment independent of any particular program and provide architecture and design solutions for space suit systems in time or ahead of being required for any particular manned flight program in the future. The new approach to space suit design and interface definition the discussion will show how the architecture is very adaptable to programmatic and funding changes with

  5. Geothermal direct-heat utilization assistance. Quarterly report, October--December 1996

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-12-31

    This report summarizes geothermal technical assistance, R&D and technology transfer activities of the Geo-Heat Center at Oregon Institute of Technology for the first quarter of FY-97. It describes 174 contracts with parties during this period related to technical assistance with geothermal direct heat projects. Areas dealt with include geothermal heat pumps, space heating, greenhouses, aquaculture, equipment, economics and resources. Research activities are summarized on greenhouse peaking. Outreach activities include the publication of a geothermal direct use Bulletin, dissemination of information, geothermal library, technical papers and seminars, and progress monitor reports on geothermal resources and utilization.

  6. Confirmation study of the effectiveness of prospect techniques for geothermal resources. Deep-seated geothermal resources survey report (Fiscal year 1994); 1994 nendo chinetsu tansa gijutsu nado kensho chosa. Shinbu chinetsu shigen chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    Drilling and survey of deep geothermal exploration wells were conducted to grasp the existing situation of deep geothermal resource and the whole image of geothermal systems in the area where geothermal resource was already developed. In the drilling work in fiscal 1994, 4000m-class rigs and the top drive system were planned to be used for drilling of 12-1/4 inch wells, but 9-5/8 inch liners were used for drilling down to depths of 2550m or deeper since the amount of lost circulation is large and the withdrawal of devices may be very difficult. And in 8-1/2 inch wells, the well was drilled down to a depth of 2950m. As to the deep resistivity exploration technology using electromagnetic method, studies were made of a multiple-frequency array induction logging (MAIL) method, a vertical electromagnetic profiling (VEMP) method, a joint analysis method, etc. Concerning the synthetic fluid inclusion logging technology, containers were lowered into the well and a comparison was made between data of the homogenization temperature analysis of the formed fluid inclusion and those of the temperature log analysis. With relation to the making of deep geothermal structural models, revision was made according to the determination of depths of Miocene formations, Pre-tertiary formations, and the Kakkonda granite. 65 refs., 268 figs., 79 tabs.

  7. Swiss geothermal energy update 1985 - 1990

    International Nuclear Information System (INIS)

    Rybach, L.; Hauber, L.

    1990-01-01

    Since 1985, geothermal R and D has evolved steadily in Switzerland. REgional low-enthalphy exploration and resource assessment are largely complete; emphasis is now on drilling and development. Vertical earth-heat exchangers (small-scale, decentralized, heat pump-coupled heating facilities) increase rapidly in number; the governmental system of risk coverage for geothermal drilling, established in 1987, gives rise to several drilling projects. Of these, a single well and a doublet have been successfully completed so far. Numerical modeling of coupled thermohydraulic processes in fracture-dominate Hot Dry Rock systems including rock-mechanics aspects, is in progress. In this paper some further efforts such as contributions to general geothermics, exploration and resource assessment activities in Switzerland, and financing of geothermal development abroad by Swiss banks are described

  8. Exploration and reservoir characterization; Technology Target Areas; TTA2 - Exploration and reservoir characterisation

    Energy Technology Data Exchange (ETDEWEB)

    2008-07-01

    In future, research within exploration and reservoir characterization will play an even more important role for Norway since resources are decreasing and new challenges like deep sea, harsh environment and last but not least environmental issues have to be considered. There are two major fields which have to be addressed within exploration and reservoir characterization: First, replacement of reserves by new discoveries and ultimate field recoveries in mature basins at the Norwegian Continental shelf, e.g. at the Halten Terrace has to be addressed. A wealth of data exists in the more mature areas. Interdisciplinary integration is a key feature of reservoir characterization, where available data and specialist knowledge need to be combined into a consistent reservoir description. A systematic approach for handling both uncertainties in data sources and uncertainties in basic models is needed. Fast simulation techniques are necessary to generate models spanning the event space, covering both underground based and model-based uncertainties. Second, exploration in frontier areas like the Barents Sea region and the deeper Voering Basin has to be addressed. The scarcity of wells in these frontier areas leads to uncertainties in the geological understanding. Basin- and depositional modelling are essential for predicting where source rocks and reservoir rocks are deposited, and if, when and which hydrocarbons are generated and trapped. Predictive models and improved process understanding is therefore crucial to meet these issues. Especially the challenges related to the salt deposits e.g. sub-salt/sub-basalt reservoir definitions in the Nordkapp Basin demands up-front research and technology developments. TTA2 stresses the need to focus on the development of new talents. We also see a strong need to push cooperation as far as possible in the present competitive environment. Projects that may require a substantial financial commitment have been identified. The following

  9. Physicochemical and biological technologies for future exploration missions

    Science.gov (United States)

    Belz, S.; Buchert, M.; Bretschneider, J.; Nathanson, E.; Fasoulas, S.

    2014-08-01

    Life Support Systems (LSS) are essential for human spaceflight. They are the key element for humans to survive, to live and to work in space. Ambitious goals of human space exploration in the next 40 years like a permanently crewed surface habitat on Moon or a manned mission to Mars require technologies which allow for a reduction of system and resupply mass. Enhancements of existing technologies, new technological developments and synergetic components integration help to close the oxygen, water and carbon loops. In order to design the most efficient LSS architecture for a given mission scenario, it is important to follow a dedicated design process: definition of requirements, selection of candidate technologies, development of possible LSS architectures and characterisation of LSS architectures by system drivers and evaluation of the LSS architectures. This paper focuses on the approach of a synergetic integration of Polymer Electrolyte Membrane Fuel Cells (PEFC) and microalgae cultivated in photobioreactors (PBR). LSS architectures and their benefits for selected mission scenarios are demonstrated. Experiments on critical processes and interfaces were conducted and result in engineering models for a PEFC and PBR system which fulfil the requirements of a synergetic integrative environment. The PEFC system (about 1 kW) can be operated with cabin air enriched by stored or biologically generated oxygen instead of pure oxygen. This offers further advantages with regard to thermal control as high oxygen concentrations effect a dense heat production. The PBR system consists of an illuminated cultivation chamber (about 5 l), a nutrients supply and harvesting and analytics units. Especially the chamber enables a microgravity adapted cultivation of microalgae. However, the peripheral units still have to be adapted in order to allow for a continuous and automated cultivation and harvesting. These automation processes will be tested and evaluated by means of a parabolic

  10. Integrating life cycle assessment and emergy synthesis for the evaluation of a dry steam geothermal power plant in Italy

    International Nuclear Information System (INIS)

    Buonocore, Elvira; Vanoli, Laura; Carotenuto, Alberto; Ulgiati, Sergio

    2015-01-01

    Greenhouse gas emissions, climate change and the rising energy demand are currently seen as most crucial environmental concerns. With the exploration of renewable energy sources to meet the challenges of energy security and climate change, geothermal energy is expected to play an important role. In this study a LCA (Life Cycle Assessment) and an EMA (Emergy Assessment) of a 20 MW dry steam geothermal power plant located in the Tuscany Region (Italy) are performed and discussed. The plant is able to produce electricity by utilizing locally available renewable resources together with a moderate support by non-renewable resources. This makes the geothermal source eligible to produce renewable electricity. However, the direct utilization of the geothermal fluid generates the release into the atmosphere of carbon dioxide, hydrogen sulfide, mercury, arsenic and other chemicals that highly contribute to climate change, acidification potential, eutrophication potential, human toxicity and photochemical oxidation. The study aims to understand to what extent the geothermal power plant is environmentally sound, in spite of claims by local populations, and if there are steps and/or components that require further attention. The application of the Emergy Synthesis method provides a complementary perspective to LCA, by highlighting the direct and indirect contribution in terms of natural capital and ecosystem services to the power plant construction and operation. The environmental impacts of the geothermal power plant are also compared to those of renewable and fossil-based power plants. The release of CO 2 -eq calculated for the investigated geothermal plant (248 g kWh −1 ) is lower than fossil fuel based power plants but still higher than renewable technologies like solar photovoltaic and hydropower plant. Moreover, the SO 2- eq release associated to the geothermal power plant (3.37 g kWh −1 ) is comparable with fossil fuel based power plants. Results suggest the

  11. South Dakota geothermal handbook

    Energy Technology Data Exchange (ETDEWEB)

    1980-06-01

    The sources of geothermal fluids in South Dakota are described and some of the problems that exist in utilization and materials selection are described. Methods of heat extraction and the environmental concerns that accompany geothermal fluid development are briefly described. Governmental rules, regulations and legislation are explained. The time and steps necessary to bring about the development of the geothermal resource are explained in detail. Some of the federal incentives that encourage the use of geothermal energy are summarized. (MHR)

  12. SPP retains interest in geothermal project

    International Nuclear Information System (INIS)

    Anon

    2007-01-01

    Slovensky plynarensky priemysel (SPP) officially indicated that it intended to drop its project of using geothermal energy in the Kosicka kotlina. This spring it published an advert that it was looking for a company that wished to acquire a majority stake in the company, Geoterm Kosice. The company was established to commercially develop this geothermal source. But it seems SPP does not want to drop the project completely. It has kept some important cards, such as control over the land where the boreholes are located Any company that wants to use geothermal energy needs a ruling issued by the Ministry of Environment defining the exploration area. Geothermal sources were found in the villages of Durkov, Svinica, Bidovce and Olsovany. Not so long ago the area was assigned to Geoterm but from May 9 the area can be explored by Slovgeoterm. Both companies have the same majority shareholder - SPP. It controls 96% of Geoterm shares and 50% of Slovgeoterm. So far it has only officially announced its intention to sell the Geoterm shares. But as far as the use of the geothermal resource is concerned since May Slovgeoterm has played a key role.The company focuses on the utilization of geothermal energy. In addition to the project in the Kosice region, it has also participated in a project to heat more than a thousand flats using geothermal water in Galanta and a project to heat greenhouses in Podhajske. There are also other geothermal projects running in Presov and Michalovce. Icelandic company, Enex, with the same specialisation controls 28% of the company and a further 20% is owned by the investment group, NEFCO based in Helsinki. Two percent of the company is owned by its general director and the general proxy of Geoterm, Otto Halas. And so without the agreement of this company no-one can start any activities related to the utilization of geothermal energy. (authors)

  13. 17th Symposium of NEDO projects. Geothermal subcommittee; Chinetsu bunkakai. Dai 17 kai jigyo hokokukai

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-09-01

    Described herein are the reports presented to the geothermal subcommittee. The NEDO's Geothermal Research Department is developing the technologies for accurately predicting the reservoir changes in the future by the geothermal development promotion investigations for distributed conditions of geothermal resources and related environmental impacts, and also by clarifying the hydrogic characteristics of the fracture systems which form the reservoirs. The department is also implementing the projects for investigating/ researching possibilities of resources distribution conditions and utilization for eventual commercialization of the deep underground geothermal resources, and also investigating utilization of small- to medium-sized geothermal binary power generation systems for effective utilization of unutilized geothermal energy. The geothermal technology development group is developing the technologies for the binary cycle power generation plants which effectively utilize unutilized medium- to high-temperature geothermal water for power generation, and also the technologies for collecting conditions at the bottom of a geothermal well being excavated in real time to improve efficiency and precision of the excavation. The other technologies being developed include those for excavation and production essential for development of power generation systems using high-temperature rocks and deep underground geothermal resources, the former being expected to contribute to expanded utilization of geothermal resources and the latter to increased geothermal power generation capacity. (NEDO)

  14. 17th Symposium of NEDO projects. Geothermal subcommittee; Chinetsu bunkakai. Dai 17 kai jigyo hokokukai

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-09-01

    Described herein are the reports presented to the geothermal subcommittee. The NEDO's Geothermal Research Department is developing the technologies for accurately predicting the reservoir changes in the future by the geothermal development promotion investigations for distributed conditions of geothermal resources and related environmental impacts, and also by clarifying the hydrogic characteristics of the fracture systems which form the reservoirs. The department is also implementing the projects for investigating/ researching possibilities of resources distribution conditions and utilization for eventual commercialization of the deep underground geothermal resources, and also investigating utilization of small- to medium-sized geothermal binary power generation systems for effective utilization of unutilized geothermal energy. The geothermal technology development group is developing the technologies for the binary cycle power generation plants which effectively utilize unutilized medium- to high-temperature geothermal water for power generation, and also the technologies for collecting conditions at the bottom of a geothermal well being excavated in real time to improve efficiency and precision of the excavation. The other technologies being developed include those for excavation and production essential for development of power generation systems using high-temperature rocks and deep underground geothermal resources, the former being expected to contribute to expanded utilization of geothermal resources and the latter to increased geothermal power generation capacity. (NEDO)

  15. Geothermal direct-heat utilization assistance. Quarterly progress report, April--June 1993

    Energy Technology Data Exchange (ETDEWEB)

    1993-08-01

    Progress is reported on the following R&D activities: evaluation of lineshaft turbine pump problems, geothermal district heating marketing strategy, and greenhouse peaking analysis. Other activities are reported on technical assistance, technology transfer, and the geothermal progress monitor.

  16. Seismic Velocity/Temperature Correlations and a Possible New Geothermometer: Insights from Exploration of a High-Temperature Geothermal System on Montserrat, West Indies

    Directory of Open Access Journals (Sweden)

    Graham Alexander Ryan

    2014-10-01

    Full Text Available In 2013, two production wells were drilled into a geothermal reservoir on Montserrat, W.I. (West Indies Drilling results confirmed the main features of a previously developed conceptual model. The results confirm that below ~220 °C there is a negative correlation between reservoir temperature and seismic velocity anomaly. However, above ~220 °C there is a positive correlation. We hypothesise that anomalous variations in seismic velocity within the reservoir are controlled to first order by the hydrothermal mineral assemblage. This study suggests a new geophysical thermometer which can be used to estimate temperatures in three dimensions with unprecedented resolution and to indicate the subsurface fluid pathways which are the target of geothermal exploitation.

  17. Use of geothermal piles combined with pile foundations

    Directory of Open Access Journals (Sweden)

    Ivan Kuzytskyi

    2016-07-01

    Full Text Available The possibility of use of geothermal piles in conditions of cold climate is considered. Full-scale experiment is conducted for using this technology in Kiev. Obtained results testify about a possibility for using the system in conditions of Ukraine, but this technology requires more detailed study and simulation of multiannual cycle of use of geothermal piles 

  18. 3-D Magnetotelluric Investigations for geothermal exploration in Martinique (Lesser Antilles). Characteristic Deep Resistivity Structures, and Shallow Resistivity Distribution Matching Heliborne TEM Results

    OpenAIRE

    Coppo , Nicolas; Baltassat , Jean-Michel; Girard , Jean-François; Wawrzyniak , Pierre; Hautot , Sophie; Tarits , Pascal; Jacob , Thomas; Martelet , Guillaume; Mathieu , Francis; Gadalia , Alain; Bouchot , Vincent; Traineau , Hervé

    2015-01-01

    International audience; Within the framework of a global French program oriented towards the development of renewable energies, Martinique Island (Lesser Antilles, France) has been extensively investigated (from 2012 to 2013) through an integrated multi-methods approach, with the aim to define precisely the potential geothermal ressources, previously highlighted (Sanjuan et al., 2003). Amongst the common investigation methods deployed, we carried out three magnetotelluric (MT) surveys located...

  19. Environmental impact of geothermal power plants in Aydın, Turkey

    Science.gov (United States)

    Yilmaz, Ersel; Ali Kaptan, Mustafa

    2017-10-01

    Geothermal energy is classified as a clean and sustainable energy source, like all industrial activities, geothermal energy power plants (GEPP) technology has also some positive and negative effects on the environment. In this paper are presented by attent not only on environmental impacts of GEPP onto Büyük Menderes River and fresh water sources, which ere used for irrigation of agricultural fields from tousands of years in basin, but also on water quality contents like heavy metals and gases emition due to drilling and electricity producing technology of GEPP's. Aydın province is located in the southwestern part of the region and its city center has around 300000 population. The high geothermal potential of this region became from geographical location, which is held on active tectonic Alpine-Himalaya Orogen belt with active volcanoes and young faults. Since 1980's to 2016 there is about 70.97% (662.75 MW) of installed capacity by according to the Mineral Research and Exploration General Directorate, there are totally 290 well licensed (540 explore licenses and 76 business licenses), and 31 geothermal powerplants purposely installed. Topic is important because of number of GEPP increased rapidly after 2012 to now a days to 36 in whole basin.

  20. Geothermal and volcanism in west Java

    Science.gov (United States)

    Setiawan, I.; Indarto, S.; Sudarsono; Fauzi I, A.; Yuliyanti, A.; Lintjewas, L.; Alkausar, A.; Jakah

    2018-02-01

    Indonesian active volcanoes extend from Sumatra, Jawa, Bali, Lombok, Flores, North Sulawesi, and Halmahera. The volcanic arc hosts 276 volcanoes with 29 GWe of geothermal resources. Considering a wide distribution of geothermal potency, geothermal research is very important to be carried out especially to tackle high energy demand in Indonesia as an alternative energy sources aside from fossil fuel. Geothermal potency associated with volcanoes-hosted in West Java can be found in the West Java segment of Sunda Arc that is parallel with the subduction. The subduction of Indo-Australian oceanic plate beneath the Eurasian continental plate results in various volcanic products in a wide range of geochemical and mineralogical characteristics. The geochemical and mineralogical characteristics of volcanic and magmatic rocks associated with geothermal systems are ill-defined. Comprehensive study of geochemical signatures, mineralogical properties, and isotopes analysis might lead to the understanding of how large geothermal fields are found in West Java compared to ones in Central and East Java. The result can also provoke some valuable impacts on Java tectonic evolution and can suggest the key information for geothermal exploration enhancement.

  1. Symposium in the field of geothermal energy

    Energy Technology Data Exchange (ETDEWEB)

    Ramirez, Miguel; Mock, John E.

    1989-04-01

    Mexico and the US are nations with abundant sources of geothermal energy, and both countries have progressed rapidly in developing their more accessible resources. For example, Mexico has developed over 600 MWe at Cerro Prieto, while US developers have brought in over 2000 MWe at the Geysers. These successes, however, are only a prologue to an exciting future. All forms of energy face technical and economic barriers that must be overcome if the resources are to play a significant role in satisfying national energy needs. Geothermal energy--except for the very highest grade resources--face a number of barriers, which must be surmounted through research and development. Sharing a common interest in solving the problems that impede the rapid utilization of geothermal energy, Mexico and the US agreed to exchange information and participate in joint research. An excellent example of this close and continuing collaboration is the geothermal research program conducted under the auspices of the 3-year agreement signed on April 7, 1986 by the US DOE and the Mexican Comision Federal de Electricidad (CFE). The major objectives of this bilateral agreement are: (1) to achieve a thorough understanding of the nature of geothermal reservoirs in sedimentary and fractured igneous rocks; (2) to investigate how the geothermal resources of both nations can best be explored and utilized; and (3) to exchange information on geothermal topics of mutual interest.

  2. FY 2001 report on the results of the development of the hydrothermal utilization power plant, etc. Development of collecting technology for deep geothermal resources (Development of drilling technology for deep geothermal resources); 1992 - 2001 nessui riyo hatsuden plant tou kaihatsu sokatsu seika hokokusho. Shinbu chinetsu shigen saishu gijutsu no kaihatsu - Shinbu chinetsu shigen kussaku gijutsu no kaihatsu (2001 nendo seika hokokusho bessatsu shiryo)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-03-01

    For the purpose of developing deep geothermal resources, development of 'drilling technology of deep geothermal resources' was made from FY 1991 to FY 2001, and the results were summarized. As to the development of bits, the bit that can be used for 30 hours or more at a temperature of 250 degrees C was developed, and the demonstrative test was made in FY 1997. Relating to the development of the high temperature use drilling mud, the mud that can be used at a temperature of 350 degrees C was developed, and the test using the actual well was conducted in FY 1997. Concerning the development of the high temperature use cement slurry, the cement slurry with specific gravity of 1.35 or below that can be used under the environment of a temperature of 350 degrees C was developed, and the hanging test of the specimen was made in the actual well in FY 1998. About the development of the high temperature use downhole motor, a prototype of 1/12 scale was fabricated in FY 1998, and the performance test at high temperature was conducted. As to the development of the high temperature use high strength cement slurry, a cement slurry with specific gravity of 1.50 or below and compressive strength of 19.61 MPa that is used under the environment of a temperature of 300 degrees C was developed, and the test on the long-term compressive strength was made in FY 2001. (NEDO)

  3. Laser Technology in Interplanetary Exploration: The Past and the Future

    Science.gov (United States)

    Smith, David E.

    2000-01-01

    Laser technology has been used in planetary exploration for many years but it has only been in the last decade that laser altimeters and ranging systems have been selected as flight instruments alongside cameras, spectrometers, magnetometers, etc. Today we have an active laser system operating at Mars and another destined for the asteroid Eros. A few years ago a laser ranging system on the Clementine mission changed much of our thinking about the moon and in a few years laser altimeters will be on their way to Mercury, and also to Europa. Along with the increased capabilities and reliability of laser systems has came the realization that precision ranging to the surface of planetary bodies from orbiting spacecraft enables more scientific problems to be addressed, including many associated with planetary rotation, librations, and tides. In addition, new Earth-based laser ranging systems working with similar systems on other planetary bodies in an asynchronous transponder mode will be able to make interplanetary ranging measurements at the few cm level and will advance our understanding of solar system dynamics and relativistic physics.

  4. Low enthalpy geothermal for oil sands (LEGO)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2008-07-01

    Geothermal energy is generated by the slow decay of radioactive materials within the Earth. Geothermal energy resources include the water from hot springs used for heating; the withdrawal of high temperature steam from deep wells; and the use of stable ground or water temperatures near the Earth's surface to heat or cool buildings or in industrial processes. Heat pumps are used to transfer heat or water from the ground into buildings in winter. This paper discussed low enthalpy geothermal options for oil sands processes in order to reduce the use of natural gas and emissions from greenhouse gases (GHGs). The study was also conducted to aid in the development of a portfolio of renewable energy options for the oil and gas sector. The study estimated the costs and benefits of operating a shallow geothermal borehole cluster for meeting a portion of process heat demands for the Nexen's Albian mine. The costs and benefits of operating thermo-chillers integrated with a shallow geothermal borehole cluster for waste heat mitigation were also evaluated. The study showed that geothermal designs can be used to meet a portion of oil sands process heat and cooling demands. Mining operators may reduce carbon emissions and energy costs for process heat demands by installing closed loop borehole heat exchangers. Geothermal heat storage capacity can also be used to increase the efficiency of thermal chillers. It was concluded that pilot plant studies would contribute to a better understanding of the technology. tabs., figs.

  5. In-Space Propulsion Technologies for Robotic Exploration of the Solar System

    Science.gov (United States)

    Johnson, Les; Meyer, Rae Ann; Frame, Kyle

    2006-01-01

    Supporting NASA's Science Mission Directorate, the In-Space Propulsion Technology Program is developing the next generation of space propulsion technologies for robotic, deep-space exploration. Recent technological advancements and demonstrations of key, high-payoff propulsion technologies have been achieved and will be described. Technologies under development and test include aerocapture, solar electric propulsion, solar sail propulsion, and advanced chemical propulsion.

  6. Geothermal fields of China

    Science.gov (United States)

    Kearey, P.; HongBing, Wei

    1993-08-01

    There are over 2500 known occurrences of geothermal phenomena in China. These lie mainly in four major geothermal zones: Xizang (Tibet)-Yunnan, Taiwan, East Coast and North-South. Hot water has also been found in boreholes in major Mesozoic-Cenozoic sedimentary basins. This paper presents a summary of present knowledge of these geothermal zones. The geological settings of geothermal occurrences are associated mainly with magmatic activity, fault uplift and depressional basins and these are described by examples of each type. Increased multipurpose utilisation of geothermal resources is planned and examples are given of current usages.

  7. World geothermal congress

    International Nuclear Information System (INIS)

    Povarov, O.A.; Tomarov, G.V.

    2001-01-01

    The World geothermal congress took place in the period from 28 May up to 10 June 2000 in Japan. About 2000 men from 43 countries, including specialists in the area of developing geothermal fields, creating and operating geothermal electrical and thermal plants and various systems for the earth heat application, participated in the work of the Congress. It was noted at the Congress, that development of the geothermal power engineering in the world is characterized by the large-scale application of geothermal resources for the electrical energy generation [ru

  8. Techno-economic assessment for the integration into a multi-product plant based on cascade utilization of geothermal energy

    International Nuclear Information System (INIS)

    Rubio-Maya, Carlos; Pastor Martínez, Edgar; Romero, Carlos E.; Ambriz Díaz, Víctor M.; Pacheco-Ibarra, J. Jesús

    2016-01-01

    Highlights: • Cascade utilization of low- and mid-temperature geothermal energy is presented. • The system consists of three thermal levels producing power, ice and useful heat. • A techno-economic analysis is performed evaluating energy and economic benefits. • A simple optimization algorithm was developed to optimize system benefits. • Inconvenience of low thermal efficiency and high capital cost of ORC were overcome. - Abstract: The Organic Rankine Cycle (ORC) is a technology that has reached maturity in cogeneration or waste heat applications. However, due to low thermal efficiency and high capital cost of ORC machines, geothermal-based ORC applications represent only a small percent sharing of the geothermal power capacity worldwide. Several countries have reported a great potential of low- and mid-temperature geothermal energy, representing an opportunity to explore a more efficient ORC integration into non-conventional applications of geothermal energy. One alternative, resembling the polygeneration concept, is known as cascade utilization of geothermal energy, where different energy outputs or products can be obtained at the same time, while improving thermal and economic performance. In this paper, a techno-economic analysis for the selection of small capacity ORC machines and absorption chillers (for ice production), to be integrated into a polygeneration plant that makes use of geothermal energy in a cascade arrangement, is presented. A simple cascade system that consists of three sequential thermal levels, producing simultaneously power, ice and useful heat is proposed, considering typical temperatures of geothermal zones in Mexico. A simple optimization algorithm, based on energy and economic models, including binary variables and manufacturer’s data, was developed to evaluate and determine optimal ORC and absorption chiller units. Results show, firstly, that inconvenience of low thermal efficiency and high capital cost of ORC machines can

  9. FY 1991 report on the survey of geothermal development promotion. Attached data. Electromagnetic exploration (High accuracy MT method) (No.38 - West area of Mt. Aso); Chinetsu kaihatsu sokushin chosa chijo chosa hokokusho futai shiryo. 1991 nendo chinetsu kaihatsu sokushin chosa - Denji tansa (Koseido MT ho) hokokusho (No.38 Asosan seibu chiiki - Tenpu shiryo)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1991-12-01

    As a part of the survey of geothermal development promotion in FY 1991, electromagnetic exploration by the high accuracy MT method was conducted to acquire the information on the geothermal structure in the west area of Mt. Aso, Kumamoto Prefecture. The detailed data were arranged as the data attached to the report on the electromagnetic exploration. As the attached data, included were the results of the 1D analysis (measuring/analysis {rho}a-F chart, analytic structure drawing), results of the 1D analysis (numerical list of the apparent resistivity analytic value and inverse analytic value) and numerical list of the apparent resistivity measured value. (NEDO)

  10. Geothermal power production in future electricity markets-A scenario analysis for Germany

    International Nuclear Information System (INIS)

    Purkus, Alexandra; Barth, Volker

    2011-01-01

    Development and diffusion of new renewable energy technologies play a central role in mitigating climate change. In this context, small-scale deep geothermal power has seen growing interest in recent years as an environmentally friendly, non-intermittent energy source with large technical potential. Following the first successful demonstration projects, the German geothermal industry is currently experiencing an internationally unparalleled growth. In this study we explore the factors driving this development, and the role geothermal power production could play in the future of the German electricity market. For this, we apply the scenario technique, based on literature analysis and interviews with companies operating actively in the field. Our findings highlight the importance of political support and framework conditions in the electricity market, with the best prospects in a decentralised energy system based on renewable energy sources, where high investment costs and the risk of discovery failure are balanced by the benefits of low-carbon base load power. - Research highlights: → Small scale geothermal plants could provide base load for RES based power systems. → New technologies allow its use even in geologically inactive regions like Germany. → Key factors for growth are political support and power market framework conditions. → Main investment barriers are comparatively high investment costs and discovery risks. → Scale of use depends on technological evolution and energy system structure.

  11. Geothermal for kids

    International Nuclear Information System (INIS)

    Nemzer, M.; Condy, M.

    1990-01-01

    This paper reports that educating children about geothermal energy is crucial to the future growth of the geothermal industry. The Geothermal Education Office (GEO) was founded in 1989 to provide materials and support to teachers and the geothermal community in educating grades K-12 about geothermal energy. GEO's goals are to: provide easy access to or referral to appropriate sources of geothermal information; foster teacher interest; create posters, booklets, lesson plans and other educational materials; monitor and review textbooks, encyclopedias and other educational materials distributed by educational groups to ensure inclusion of appropriate, accurate information and to encourage fair treatment of alternative energy resources; contribute articles to industry, science and educational publications; and foster communication and cooperation among GEO, the geothermal industry, government agencies, and educational and environmental groups

  12. Geothermal energy in Jordan

    International Nuclear Information System (INIS)

    Al-Dabbas, Moh'd A. F.

    1993-11-01

    The potential of geothermal energy utilization in Jordan was discussed. The report gave a summary of the location of geothermal anomalies in Jordan, and of ongoing projects that utilize geothermal energy for greenhouse heating, fish farming, refrigeration by absorption, and water desalination of deep aquifers. The problems facing the utilization of geothermal energy in Jordan were identified to be financial (i.e. insufficient allocation of local funding, and difficulty in getting foreign financing), and inadequate expertise in the field of geothermal energy applications. The report gave a historical account of geothermal energy utilization activities in Jordan, including cooperation activities with international organizations and foreign countries. A total of 19 reports already prepared in the areas of geochemical and hydrological studies were identified. The report concluded that the utilization of geothermal energy offers some interesting economic possibilities. (A.M.H.). 4 refs. 1 map

  13. Geothermal energy in Montana: site data base and development status

    Energy Technology Data Exchange (ETDEWEB)

    Brown, K.E.

    1979-11-01

    A short description of the state's geothermal characteristics, economy, and climate is presented. More specific information is included under the planning regions and site specific data summaries. A brief discussion of the geothermal characteristics and a listing of a majority of the known hot springs is included. The factors which influence geothermal development were researched and presented, including: economics, financing, state leasing, federal leasing, direct-use technology, water quality laws, water rights, and the Major Facility Siting Act. (MHR)

  14. Geothermal heat pumps - gaining ground in the UK and worldwide

    International Nuclear Information System (INIS)

    Curtis, Robin

    2001-01-01

    This 2001 edition of the guide to UK renewable energy companies examines the geothermal heat pump sector, and discusses the technology involved, installations of geothermal heat pumps, the activity in the UK market with increased interest in UK geothermal heat pump products from abroad, and developments in the building sector. The UK government's increased support for the industry including its sponsorship of the Affordable Warmth programme, and the future potential of ground source systems are discussed

  15. Exploring Adult Learners Usage of Information Communication Technology during a Virtual Peer Coaching Experience

    Science.gov (United States)

    Ladyshewsky, Richard; Pettapiece, Ronald G.

    2015-01-01

    The purpose of this study was to explore how post-graduate students in a fully online business course used information communication technology during a virtual peer coaching experience. In this exploration of technology use it was found students required additional guidance in the use of technologies such as email, telephone calling, and more…

  16. Measurement of Subsidence in the Yangbajain Geothermal Fields from TerraSAR-X

    Science.gov (United States)

    Li, Yongsheng; Zhang, Jingfa; Li, Zhenhong

    2016-08-01

    Yangbajain contains the largest geothermal energy power station in China. Geothermal explorations in Yangbajain first started in 1976, and two plants were subsequently built in 1981 and 1986. A large amount of geothermal fluids have been extracted since then, leading to considerable surface subsidence around the geothermal fields. In this paper, InSAR time series analysis is applied to map the subsidence of the Yangbajain geothermal fields during the period from December 2011 to November 2012 using 16 senses of TerraSAR-X stripmap SAR images. Due to its high resolution and short repeat cycle, TerraSAR-X provides detailed surface deformation information at the Yangbajain geothermal fields.

  17. Present situation and future of utilization of geothermal energy in China

    International Nuclear Information System (INIS)

    Huang, Z.; Zhi, W.F.

    1998-01-01

    From the 1970s, the Chinese government increased investment in the development of geothermal resources and other new energy, and some experimental geothermal power stations have been built successfully. In the late 1980s, the exploration of high temperature geothermal resources was increased. Geothermal fluid with temperatures over 200 C was measured in several boreholes. In ZK4002 well, Yangbajing, the temperature is even as high as 329.8 C. By the year 2010, several geothermal power plants with high temperatures and great capacity will be built, so that great advances will be made in the development of geothermal energy in China

  18. Investigating ultra high-enthalpy geothermal systems: a collaborative initiative to promote scientific opportunities

    Science.gov (United States)

    Elders, W. A.; Nielson, D.; Schiffman, P.; Schriener, A., Jr.

    2014-12-01

    Scientists, engineers, and policy makers gathered at a workshop in the San Bernardino Mountains of southern California in October 2013 to discuss the science and technology involved in developing high-enthalpy geothermal fields. A typical high-enthalpy geothermal well between 2000 and 3000 m deep produces a mixture of hot water and steam at 200-300 °C that can be used to generate about 5-10 MWe of electric power. The theme of the workshop was to explore the feasibility and economic potential of increasing the power output of geothermal wells by an order of magnitude by drilling deeper to reach much higher pressures and temperatures. Development of higher enthalpy geothermal systems for power production has obvious advantages; specifically higher temperatures yield higher power outputs per well so that fewer wells are needed, leading to smaller environmental footprints for a given size of power plant. Plans for resource assessment and drilling in such higher enthalpy areas are already underway in Iceland, New Zealand, and Japan. There is considerable potential for similar developments in other countries that already have a large production of electricity from geothermal steam, such as Mexico, the Philippines, Indonesia, Italy, and the USA. However drilling deeper involves technical and economic challenges. One approach to mitigating the cost issue is to form a consortium of industry, government and academia to share the costs and broaden the scope of investigation. An excellent example of such collaboration is the Iceland Deep Drilling Project (IDDP), which is investigating the economic feasibility of producing electricity from supercritical geothermal reservoirs, and this approach could serve as model for future developments elsewhere. A planning committee was formed to explore creating a similar initiative in the USA.

  19. Geothermal direct use engineering and design guidebook

    International Nuclear Information System (INIS)

    Lienau, P.J.; Lunis, B.C.

    1991-01-01

    The Geothermal Direct Use Engineering and Design Guidebook is designed to be a comprehensive, thoroughly practical reference guide for engineers and designers of direct heat projects. These projects could include the conversion of geothermal energy into space heating and cooling of buildings, district heating, greenhouse heating, aquaculture and industrial processing. The Guidebook is directed at understanding the nature of geothermal resources and the exploration of the resources, fluid sampling techniques, drilling, and completion of geothermal wells through well testing, and reservoir evaluation. It presents information useful to engineers on the specification of equipment including well pumps, piping, heat exchangers, space heating equipment, heat pumps and absorption refrigeration. A compilation of current information about greenhouse aquaculture and industrial applications is included together with a discussion of engineering cost analysis, regulation requirements, and environmental consideration. The purpose of the Guidebook is to provide an integrated view for the development of direct use projects for which there is a very large potential in the United States

  20. Geothermal direct use engineering and design guidebook

    Energy Technology Data Exchange (ETDEWEB)

    Lienau, P.J.; Lunis, B.C. (eds.)

    1991-01-01

    The Geothermal Direct Use Engineering and Design Guidebook is designed to be a comprehensive, thoroughly practical reference guide for engineers and designers of direct heat projects. These projects could include the conversion of geothermal energy into space heating and cooling of buildings, district heating, greenhouse heating, aquaculture and industrial processing. The Guidebook is directed at understanding the nature of geothermal resources and the exploration of the resources, fluid sampling techniques, drilling, and completion of geothermal wells through well testing, and reservoir evaluation. It presents information useful to engineers on the specification of equipment including well pumps, piping, heat exchangers, space heating equipment, heat pumps and absorption refrigeration. A compilation of current information about greenhouse aquaculture and industrial applications is included together with a discussion of engineering cost analysis, regulation requirements, and environmental consideration. The purpose of the Guidebook is to provide an integrated view for the development of direct use projects for which there is a very large potential in the United States.

  1. Geothermal direct use engineering and design guidebook

    Energy Technology Data Exchange (ETDEWEB)

    Bloomquist, R.G.; Culver, G.; Ellis, P.F.; Higbee, C.; Kindle, C.; Lienau, P.J.; Lunis, B.C.; Rafferty, K.; Stiger, S.; Wright, P.M.

    1989-03-01

    The Geothermal Direct Use Engineering and Design Guidebook is designed to be a comprehensive, thoroughly practical reference guide for engineers and designers of direct heat projects. These projects could include the conversion of geothermal energy into space heating cooling of buildings, district heating, greenhouse heating, aquaculture and industrial processing. The Guidebook is directed at understanding the nature of geothermal resources and the exploration of these resources, fluid sampling techniques, drilling, and completion of geothermal wells through well testing, and reservoir evaluation. It presents information useful to engineers on the specification of equipment including well pumps, piping, heat exchangers, space heating equipment, heat pumps and absorption refrigeration. A compilation of current information about greenhouse, aquaculture and industrial applications is included together with a discussion of engineering cost analysis, regulation requirements, and environmental considerations. The purpose of the Guidebook is to provide an integrated view for the development of direct use projects for which there is a very potential in the United States.

  2. Combined geophysical, geochemical and geological investigations of geothermal reservoir characteristics in Lower Saxony, Germany

    Science.gov (United States)

    Hahne, B.; Thomas, R.

    2012-04-01

    The North German basin provides a significant geothermal potential, although temperature gradients are moderate. However, deep drilling up to several thousand meters is required to reach temperatures high enough for efficient generation of geothermal heat and electric power. In these depths we have not much information yet about relevant physical properties like porosity or permeability of the rock formations. Therefore the costs of developing a geothermal reservoir and the risk of missing the optimum drilling location are high. The collaborative research association "Geothermal Energy and High Performance Drilling" (gebo) unites several universities and research institutes in Lower Saxony, Germany. It aims at a significant increase of economic efficiency by introducing innovative technology and high tech materials resisting temperatures up to 200 °C in the drilling process. Furthermore, a better understanding of the geothermal reservoir is essential. gebo is structured into four main fields: Drilling Technology, Materials, Technical Systems and Geosystem. Here, we show the combined work of the Geosystem group, which focuses on the exploration of geological fault zones as a potential geothermal reservoir as well as on modeling the stress field, heat transport, coupled thermo-hydro-mechanical processes, geochemical interactions and prediction of the long-term behavior of the reservoir. First results include combined seismic and geoelectric images of the Leinetalgraben fault system, a comparison of seismic images from P- and S-wave measurements, mechanical properties of North German rocks from field and laboratory measurements as well as from drill cores, seismological characterization of stimulated reservoirs, a thermodynamic "gebo" database for modeling hydrogeochemical processes in North German formation waters with high salinity and at high temperatures, stress models for specific sites in northern Germany, and modeling results of permeability and heat transport

  3. The USGS national geothermal resource assessment: An update

    Science.gov (United States)

    Williams, C.F.; Reed, M.J.; Galanis, S.P.; DeAngelo, J.

    2007-01-01

    The U. S. Geological Survey (USGS) is working with the Department of Energy's (DOE) Geothermal Technologies Program and other geothermal organizations on a three-year effort to produce an updated assessment of available geothermal resources. The new assessment will introduce significant changes in the models for geothermal energy recovery factors, estimates of reservoir volumes, and limits to temperatures and depths for electric power production. It will also include the potential impact of evolving Enhanced Geothermal Systems (EGS) technology. An important focus in the assessment project is on the development of geothermal resource models consistent with the production histories and observed characteristics of exploited geothermal fields. New models for the recovery of heat from heterogeneous, fractured reservoirs provide a physically realistic basis for evaluating the production potential of both natural geothermal reservoirs and reservoirs that may be created through the application of EGS technology. Project investigators have also made substantial progress studying geothermal systems and the factors responsible for their formation through studies in the Great Basin-Modoc Plateau region, Coso, Long Valley, the Imperial Valley and central Alaska, Project personnel are also entering the supporting data and resulting analyses into geospatial databases that will be produced as part of the resource assessment.

  4. Achievement report for fiscal 2000 on New Sunshine Project aiding program. Development of hot water utilizing power generation plant (Development of deep seated geothermal resource collection technologies - development of deep seated geothermal resource production technologies); 2000 nendo nessui riyo hatsuden plant to kaihatsu seika hokokusho. Shinbu chinetsu shigen saishu gijutsu no kaihatsu (Shinbu chinetsu shigen seisan gijutu no kaihatsu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    Items of information about deep seated geothermal resource production technologies were collected, and tests and studies were performed using actual wells. This paper summarizes the achievements in fiscal 2000. In developing the PTDS logging technology, it was verified in the actual well tests that the measured density of a D probe is consistent with the theoretical density, and the accuracy is satisfactory. The extended time measurement at fixed points on temperatures of fluids in the wells, pressures, flow rates, and fluid densities has identified chronological change of the characteristics of the fluids in the wells, including the enthalpy, proving them to be effective in well control. In developing the PTC monitoring technology, a fluid extracting machine for the downhole fluid sampler was fabricated, which has collected hot water successfully in the actual well twice out of seven attempts. In developing the high temperature tracer monitoring technology, experiments were performed using vapor phase and liquid phase tracers, whereas re-discharge of all the tracer materials was identified. In developing the scale preventing and removing technology, a silica recovering device capable of treating hot water at 0.6 ton per hour as maximum was fabricated, and the site tests were performed by using cation-based coagulant. (NEDO)

  5. NASA's Exploration Technology Development Program Energy Storage Project Battery Technology Development

    Science.gov (United States)

    Reid, Concha M.; Miller, Thomas B.; Mercer, Carolyn R.; Jankovsky, Amy L.

    2010-01-01

    Technical Interchange Meeting was held at Saft America s Research and Development facility in Cockeysville, Maryland on Sept 28th-29th, 2010. The meeting was attended by Saft, contractors who are developing battery component materials under contracts awarded through a NASA Research Announcement (NRA), and NASA. This briefing presents an overview of the components being developed by the contractor attendees for the NASA s High Energy (HE) and Ultra High Energy (UHE) cells. The transition of the advanced lithium-ion cell development project at NASA from the Exploration Technology Development Program Energy Storage Project to the Enabling Technology Development and Demonstration High Efficiency Space Power Systems Project, changes to deliverable hardware and schedule due to a reduced budget, and our roadmap to develop cells and provide periodic off-ramps for cell technology for demonstrations are discussed. This meeting gave the materials and cell developers the opportunity to discuss the intricacies of their materials and determine strategies to address any particulars of the technology.

  6. Geothermal Brief: Market and Policy Impacts Update

    Energy Technology Data Exchange (ETDEWEB)

    Speer, B.

    2012-10-01

    Utility-scale geothermal electricity generation plants have generally taken advantage of various government initiatives designed to stimulate private investment. This report investigates these initiatives to evaluate their impact on the associated cost of energy and the development of geothermal electric generating capacity using conventional hydrothermal technologies. We use the Cost of Renewable Energy Spreadsheet Tool (CREST) to analyze the effects of tax incentives on project economics. Incentives include the production tax credit, U.S. Department of Treasury cash grant, the investment tax credit, and accelerated depreciation schedules. The second half of the report discusses the impact of the U.S. Department of Energy's (DOE) Loan Guarantee Program on geothermal electric project deployment and possible reasons for a lack of guarantees for geothermal projects. For comparison, we examine the effectiveness of the 1970s DOE drilling support programs, including the original loan guarantee and industry-coupled cost share programs.

  7. Quantifying the undiscovered geothermal resources of the United States

    Science.gov (United States)

    Williams, Colin F.; Reed, Marshall J.; DeAngelo, Jacob; Galanis, S. Peter

    2009-01-01

    In 2008, the U.S. Geological Survey (USGS) released summary results of an assessment of the electric power production potential from the moderate- and high-temperature geothermal resources of the United States (Williams et al., 2008a; USGS Fact Sheet 2008-3082; http://pubs.usgs.gov/fs/2008/3082). In the assessment, the estimated mean power production potential from undiscovered geothermal resources is 30,033 Megawatts-electric (MWe), more than three times the estimated mean potential from identified geothermal systems: 9057 MWe. The presence of significant undiscovered geothermal resources has major implications for future exploration and development activities by both the government and private industry. Previous reports summarize the results of techniques applied by the USGS and others to map the spatial distribution of undiscovered resources. This paper describes the approach applied in developing estimates of the magnitude of the undiscovered geothermal resource, as well as the manner in which that resource is likely to be distributed among geothermal systems of varying volume and temperature. A number of key issues constrain the overall estimate. One is the degree to which characteristics of the undiscovered resources correspond to those observed among identified geothermal systems. Another is the evaluation of exploration history, including both the spatial distribution of geothermal exploration activities relative to the postulated spatial distribution of undiscovered resources and the probability of successful discoveries from the application of standard geothermal exploration techniques. Also significant are the physical, chemical, and geological constraints on the formation and longevity of geothermal systems. Important observations from this study include the following. (1) Some of the largest identified geothermal systems, such as The Geysers vapor-dominated system in northern California and the diverse geothermal manifestations found in Yellowstone

  8. The geothermal conditions in the Rhine Graben - a summary

    Energy Technology Data Exchange (ETDEWEB)

    Rybach, L.

    2007-07-15

    This article takes a look at the situation in the upper Rhine valley with respect to its geothermal potential. The Rhine Graben, being part of the European Mid-Continental Rift System is characterised by thinned crust and therefore higher heat flow rates. According to the author, the Rhine Graben presents generally favourable conditions for geothermal energy development and utilisation. This illustrated article presents information on the geological structures to be found and figures obtained from the geothermal exploration project at Soulz-sous-Forets, France, and a number of other geothermal investigation and production projects in Germany.

  9. Applying satellite technology to energy and mineral exploration

    Science.gov (United States)

    Carter, William D.; Rowan, Lawrence C.

    1978-01-01

    IGCP Project 143 ("Remote Sensing and Mineral Exploration"), is a worldwide research project designed to make satellite data an operational geological tool along with the geologic pick, hand lens, topographic map, aerial photo and geophysical instruments and data that comprise the exploration package. While remote sensing data will not replace field exploration and mapping, careful study of such data prior to field work should make the effort more efficient.

  10. Industrial application of geothermal energy in Southeast Idaho

    Energy Technology Data Exchange (ETDEWEB)

    Batdorf, J.A.; McClain, D.W.; Gross, M.; Simmons, G.M.

    1980-02-01

    Those phosphate related and food processing industries in Southeastern Idaho are identified which require large energy inputs and the potential for direct application of geothermal energy is assessed. The total energy demand is given along with that fractional demand that can be satisfied by a geothermal source of known temperature. The potential for geothermal resource development is analyzed by examining the location of known thermal springs and wells, the location of state and federal geothermal exploration leases, and the location of federal and state oil and gas leasing activity in Southeast Idaho. Information is also presented regarding the location of geothermal, oil, and gas exploration wells in Southeast Idaho. The location of state and federal phosphate mining leases is also presented. This information is presented in table and map formats to show the proximity of exploration and development activities to current food and phosphate processing facilities and phosphate mining activities. (MHR)

  11. Geothermal energy: clean power from the Earth's heat

    Science.gov (United States)

    Duffield, Wendell A.; Sass, John H.

    2003-01-01

    . This heat then rises to and through the Earth’s surface, where it escapes into the atmosphere. The amount of heat that flows annually from the Earth into the atmosphere is enormous—equivalent to ten times the annual energy consumption of the United States and more than that needed to power all nations of the world, if it could be fully harnessed. Even if only 1 percent of the thermal energy contained within the uppermost 10 kilometers of our planet could be tapped, this amount would be 500 times that contained in all oil and gas resources of the world. How might we benefit from this vast amount of thermal energy beneath our feet? Where, by what means, and how much of the Earth’s natural heat can be usefully harnessed? These are especially important questions to contemplate, because global population is expected to soon exceed seven billion and many scientists believe that the world’s fossilfuel resources may be substantially depleted within this century. Faced with such prospects, both the public and private sectors are working toward more fully utilizing the Earth’s abundant thermal energy and other alternative energy resources. A skeptic might question the wisdom of devoting much national effort to geothermal energy development, especially because many experts think that geothermal heat can contribute at most about 10 percent to the Nation’s energy supply using current technologies. However, ongoing advances in exploration and heat-extraction technologies are improving our ability to use the resource and may substantially increase the geothermal contribution to the Nation’s energy supply. In an attempt to help national planners and average citizens alike understand the nature and energy potential of geothermal resources, this book (1) describes the distribution and nature of geothermal energy, (2) reviews the common types of geothermal systems that provide useful energy with current technology, (3) considers potential geothermal resources that might

  12. Geothermal today: 1999 Geothermal Energy Program highlights (Clean energy for the 21st century booklet)

    Energy Technology Data Exchange (ETDEWEB)

    Green, B.; Waggoner, T.

    2000-05-10

    The purpose of this publication is to educate and inform readers about research activities being carried out by the federal Geothermal Energy Program, and its achievements and future goals. This publication should help raise the visibility and awareness of geothermal energy contributions and potential, especially as part of the nation's clean energy technologies portfolio. The message of the publication is that program resources are being well spent and the results are real and tangible. A secondary message is that geothermal energy is a viable generation option with environmental, economic, and other benefits.

  13. Innovative approach for risk assessment in green field geothermal project

    NARCIS (Netherlands)

    Batini, F.; Wees, J.-D. van

    2010-01-01

    At present, the worldwide geothermal energy production provides less than 1% of the world's energy needs but the geothermal resources confined in the first 6 km of the earth's crust are estimated to be in the fairly above 200 GW of which 50-80 GW are located in Europe. Exploring and developing at

  14. A review of geothermal mapping techniques using remotely sensed ...

    African Journals Online (AJOL)

    Exploiting geothermal (GT) resources requires first and foremost locating suitable areas for its development. Remote sensing offers a synoptic capability of covering large areas in real time and can cost effectively explore prospective geothermal sites not easily detectable using conventional survey methods, thus can aid in ...

  15. The possibilities of geothermal heat in the Netherlands

    International Nuclear Information System (INIS)

    Walter, F.

    1995-01-01

    Attention is paid to the exploration and conversion methods of geothermal heat, investment and maintenance costs of geothermal power plants, both for the Dutch situation. Applications in different European countries are briefly discussed. 3 figs., 3 ills., 1 tab., 4 refs

  16. Exploring health information technology education: an analysis of the research.

    Science.gov (United States)

    Virgona, Thomas

    2012-01-01

    This article is an analysis of the Health Information Technology Education published research. The purpose of this study was to examine selected literature using variables such as journal frequency, keyword analysis, universities associated with the research and geographic diversity. The analysis presented in this paper has identified intellectually significant studies that have contributed to the development and accumulation of intellectual wealth of Health Information Technology. The keyword analysis suggests that Health Information Technology research has evolved from establishing concepts and domains of health information systems, technology and management to contemporary issues such as education, outsourcing, web services and security. The research findings have implications for educators, researchers, journal.

  17. Studies of geothermal background and isotopic geochemistry of thermal waters in Jiangxi Province

    International Nuclear Information System (INIS)

    Zhou Wenbin; Sun Zhanxue; Li Xueli; Shi Weijun

    1996-10-01

    The terrestrial heat flow measurement, isotope and geochemical techniques have been systematically applied to the geothermal systems in Jiangxi Province. Results show that the thermal waters in the study area all belong to the low-medium temperature convective geothermal system, which essentially differs from high temperature geothermal systems with deep magmatic heat sources. It has been proven that the isotope and geochemical techniques are very useful and effective in geothermal exploration. (13 refs., 14 tabs., 8 figs.)

  18. THE PROBLEM OF ENERGY EFFICIENCY OF THE GEOTHERMAL CIRCULATION SYSTEM IN DIFFERENT MODES OF REINJECTION OF THE COOLANT

    OpenAIRE

    D. K. Djavatov; A. A. Azizov

    2017-01-01

    Aim. Advanced technologies are crucial for widespread use of geothermal energy to ensure its competitiveness with conventional forms of energy. To date, the basis for the development of geothermal energy is the technology of extracting the heat transfer fluids from the subsoil. There are the following ways to extract the coolant: freeflow; pumping and circular methods. Of greatest interest is the technology to harness the geothermal energy based on geothermal circulatory system (GCS). There i...

  19. Energia geotermica at the present time: Geothermal Today (Spanish version); La energia geotermica en la actualidad

    Energy Technology Data Exchange (ETDEWEB)

    2003-09-01

    This outreach publication highlights federal program milestones and accomplishments of the DOE Geothermal Technologies Program for 2003. This is a special 8-page Spanish supplement for the audience at the Geothermal Resources Council/Geothermal Energy Association Annual Meeting and Industry Exhibit, Morelia, Mexico.

  20. GEOTHERMAL GREENHOUSING IN TURKEY

    Directory of Open Access Journals (Sweden)

    Sedat Karaman

    2016-07-01

    Full Text Available Use of renewable energy resources should be brought forward to reduce heating costs of greenhouses and to minimize the use of ever-depleting fossil fuels. Geothermal energy not only provides the heat required throughout plant growth, but also allow a year-long production. Geothermal resources with several other benefits therefore play significant role in agricultural activities. With regard to geothermal potential and implementation, Turkey has the 7th place in the world and the 1st place in Europe. Majority of country geothermal resources is used in greenhouse heating. The size of geothermal greenhouses increased 5 folds during the last decade and reached to 2500 decare. In this study, current status of geothermal greenhousing of Turkey was presented; problems and possible solutions were discussed.